Titanium Metal News

TA series vs TC series comparison: pure titanium vs titanium alloy selection decision + 7 major grades + 5 working conditions + 5 steps to avoid pits

Published by Engineering Team, Shaanxi Qianyi Tuoda Technology Co., Ltd on 2026-08-08

TA series pure titanium and TC series titanium alloy are two kinds of titanium materials widely used in industrial field, There is a significant difference in mechanical properties between the two, and that span of the tensile property can reach 2 - 5 time.Located in Baoji, China Titanium Valley, Shaanxi Qianyi Tuoda Technology Co., Ltd.Titanium non-standard equipmentCustomization and titanium sales for many years, has accumulated a large number of first-line selection of practical experience.Daily service, Often encountered all kinds of material selection deviation problems, Many project drawings are marked with TA2 pure titanium, But the actual operating temperature exceeds 350℃, More suitable for TC4 titanium alloyThere are also chemical strong corrosion conditions blindly selected TC4 titanium alloy, Ignore TA10 exclusive corrosion advantages, This eventually leads to equipment loss.In this paper, TA pure titanium is systematically combed, TC titanium alloy complete selection system, Covers 7 major mainstream brand parameters comparison, Class 5 core adaptation conditions, Standardized 5-step selection process and 5 high-frequency pit avoidance points, for the chemical, Marine Engineering, aerospace, Medical military field provides accurate titanium material selection reference.

Combined with years of project landing experience, TA and TC series titanium material selection can be summarized as three core criteria, Adapt to most industrial scenarios.First, according to the working temperature selection, the operating temperature ≥350℃ high temperature working conditions, preferably TC series titanium alloy;Secondly, according to the strength requirements, TC series is adapted to high load and high strength working conditions;Finally, the corrosion environment selection, bromine-containing, Strong corrosion conditions of chloride ions, TA series pure titanium with excellent corrosion resistance is preferred.Improper material selection and adaptation can easily cause short-term failure of equipment, causing equipment maintenance, replacement and even safety production hazards.

TA series is pure titanium, Contains only trace alloying elements, Includes TA1, TA10 Four common brands, Stable tensile strength range 240 - 450 MPa, Normal temperature ≤300℃, Excellent acid and alkali corrosion resistance, Low processing difficulty, Excellent cost performance, It is a common substrate for industrial corrosion protection scenarios.TC series belongs to modified titanium alloy, addition of aluminum, vanadium, Molybdenum and other alloying elements, The main brand is TC4, Tensile strength of not less than 895 MPa, High temperature resistance greatly improved, Maximum adaptation 600℃ high temperature conditions, structural strength outstanding, But the corrosion resistance is weaker than pure titanium, Complex processing technology, The purchase cost is 3-5 times that of pure titanium.Most technicians are confused about material selection, Normal chemical ≤300℃ Normal temperature medium temperature working condition, TA series pure titanium can fully meet the needs of use, TC series titanium alloy is mainly suitable for high temperature, high strength, Lightweight special conditions.

Each of the four TA series pure titanium grades has its own application scenarios to meet the needs of different working conditions.TA1 Pure titanium purity ≥99.5%, Tensile strength ≥240MPa, excellent biocompatibility, Adapted medical devices, Clean scenes such as food processing equipmentTA2 Purity ≥99.0%, Tensile strength ≥345MPa, Comprehensive performance balance, It's a chemical utility., Core Materials for Offshore Engineering EquipmentTA9 adds trace palladium element, effectively improves the corrosion resistance of reducing acid, and is mostly used in reducing medium conditions such as dilute hydrochloric acid;TA10 molybdenum, nickel-modified component, Tensile strength up to 450 MPa, For bromide ion, chloridion, Excellent adaptability to strong corrosive media such as wet chlorine, It is the best material for strong corrosion conditions in chemical industry.

Three TC series titanium alloys feature high strength and high temperature performance, suitable for high-end industrial scenarios.TC4 adopts Ti-6Al-4V ratio, Tensile strength ≥895MPa, It's a versatile titanium alloy., Widely used in aviation accessories, Precision medical components, Military non-standard accessoriesTC11 mechanical properties further upgraded, Tensile strength ≥1030MPa, Suitable for high temperature load bearing parts of aeroengineTC17 tensile strength up to 1120MPa, high temperature resistant, Excellent load resistance, It is mostly used for aviation ultra-high temperature, High load core component.Parameter comparison visible, TC4 tensile strength is about 2.6 times higher than TA2, However, the alloy composition makes its corrosion resistance only 70% of TA2, Under severe corrosion conditions, The compatibility is far less than TA10 pure titanium.

According to the five mainstream working conditions of the industry, it can accurately match the corresponding titanium series and grades.Conventional ≤300℃ chemical corrosion conditions, corrosion resistance as the core requirements, preferably TA2, TA10 pure titanium;TA2 pure titanium can resist seawater corrosion for a long time and has good stability under working conditions.Operate the equipment at high temperatures of 350-600℃, relying on the high temperature strength of TC4 titanium alloy to ensure stable operation of the equipment;Aerospace lightweight load-bearing components, according to the load grade selection TC4, TC11 titanium alloy;Medical devices can be paired with TA1 pure titanium or TC4 titanium alloy as required, taking into account biocompatibility and structural strength.

Standardized five-step selection process can avoid most selection errors.The first step is to verify the working temperature, and directly lock the TC series under high temperature conditions above 350℃;The second step is to calculate the strength requirement of the component, and titanium alloy is selected for the high strength working condition above 600MPa;step 3, detect that corrosion grade of the medium, and selecting TA10 and TA9 pure titanium as strong corrosion medium contain chlorine and bromine;The fourth step is to adapt TC series to special working conditions of aviation and military industry in combination with application scenarios;The fifth step is to combine the project budget and give priority to TA pure titanium with high cost performance under normal working conditions.

Relying on the practical operation experience of Baoji Titanium Valley Project, share five groups of typical landing cases.400℃ high temperature blades using TC4 forgings, long-term high temperature and high strength stable operation state;Misuse of TC4 in the initial stage of bromine-containing acetic acid chemical reactor, Crevice corrosion appeared after one year, After replacing TA10 pure titanium, the equipment will be stable for a long time.Seawater TA2 heat exchanger has been put into use for eight years without pitting and corrosion problems;Medical TA1 plate with excellent biocompatibility, suitable for human implantation scenarios;380℃ steam equipment misuse TA2 pure titanium, short-term creep deformation, After replacing TC4 titanium alloy, the working condition returned to normal.

At the same time, comb five selection and processing pit avoidance points to help enterprises reduce equipment loss.One is to avoid the mistake of selecting TA pure titanium under high temperature conditions, and creep deformation of components is easy to occur at temperatures exceeding 350℃;Second, use TC titanium alloy with caution in strong corrosive media to avoid crevice corrosion failure;Third, ordinary chemical conditions do not need to blindly select TC4, which can control production costs and processing difficulties;Fourth, verify MTC material report, TC alloy material certificate needs to be marked with complete aluminum, Vanadium alloy element parameters, Ensure material complianceFifth, distinguish the processing technology, TC forging temperature ≥900℃, TA forging temperature ≥ 850 ℃, Mixed process is easy to cause component cracking.

As a local titanium non-standard custom enterprise in Baoji, Shaanxi Qianyi Tuoda can provide three exclusive supporting services.Free one-to-one mode selection consultation, according to temperature, medium, strength parameters quickly match the adaptation brand;TA1, TA2, TA9, TA10, TC4 and other full series of titanium stock, sufficient supply;Free verification MTC material report, confirm brand parameters, alloy composition and industry standard compliance.Technical consultation: 15909236031 / 0917-3557966, official website: www.sxqytd.com

in summary, The core logic of TA and TC titanium material selection is clear, TC series for high temperature and high strength working conditions, TA series for strong corrosion chemical working conditions, Pure titanium for general chemical industry, Titanium alloy for high-end special scenes.The accuracy of material selection directly determines the service life and production safety of equipment.This paper is compiled according to GB/T 3620.1-2016, GB/T 13810-2007, AMS4911 and other open industry standards.

disclaimerThis article TA, TC series titanium material selection parameters, Adaptation scheme for technical reference only, The actual use effect depends on the medium environment, running temperature, Pressure load and other working conditions, The final selection plan shall be subject to written confirmation by both parties.

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