With titanium content ≥ 99.2%, balanced strength and ductility, and excellent corrosion resistance, TA2 is the most widely used commercially pure titanium grade in the world.
TA2 is a commercially pure (CP) titanium grade defined by Chinese standards, equivalent to Grade 2 under ASTM/UNS designation. Its composition is controlled primarily through oxygen content - ≤ 0.25% - which acts as the key element tuning its mechanical properties.
| Specification | Detail |
|---|---|
| Titanium content | ≥ 99.2% |
| Chinese designation | TA2 |
| International equivalent | Grade 2 (ASTM B265, B348, B338, etc.) |
| Oxygen control | ≤ 0.25% |
| Classification | Commercially pure titanium - not an alloy |
TA2 sits in the middle of the CP titanium family (TA1–TA5), delivering the best overall balance of strength, ductility, corrosion resistance, formability, and cost - which is why it accounts for the largest share of CP titanium consumption globally.
Core Properties
Mechanical Properties
| Property | Value |
|---|---|
| Tensile strength | 350–550 MPa |
| Elongation | Up to 25% |
| Strength class | Medium - stronger than TA1, more ductile than TA3 |
| Low-temperature toughness | Excellent - no ductile-to-brittle transition |
| Long-term service temperature | ≤ 350°C |
Corrosion Resistance
TA2's standout characteristic. It performs exceptionally in:
- Seawater - virtually immune to saltwater corrosion
- Chloride environments - resists pitting and crevice corrosion that attack stainless steel
- Oxidizing acids - stable in nitric acid and most organic acids
- Alkaline solutions - excellent resistance across a wide pH range
- A self-forming 5–10 nm TiO₂ oxide film provides passive protection that heals instantly if scratched.
Biocompatibility
TA2 is classified as a bio-friendly metal - non-toxic, non-allergenic, and compatible with human tissue. This makes it a standard material for surgical implants and medical devices.
Weldability
TA2 is readily weldable, primarily using TIG (argon arc) welding. Welded joints maintain good ductility and corrosion resistance with proper shielding gas coverage.
Formability
| Method | Capability |
|---|---|
| Cold working | Excellent - elongation up to 25% allows deep drawing, bending, and stamping |
| Hot working | Performed at 400–600°C for larger deformations |
| Machining | Similar to stainless steel - poor thermal conductivity causes heat buildup; strong tool adhesion requires sharp tooling, low speeds, and generous coolant |
Key Machining Notes
- Thermal conductivity is low - heat concentrates at the cutting zone
- Material tends to adhere to cutting tools - use coated carbide tools, moderate feeds, and high-pressure coolant
- Similar machinability rating to austenitic stainless steel
Applications by Industry
Petrochemical and Chemical Processing
TA2 is the material of choice for equipment operating in corrosive chemical environments:
- Heat exchangers - titanium heating tubes that outlast stainless steel by years in chloride-bearing media
- Reactor vessel linings - protecting steel shells from acid and alkali attack
- Pipe fittings - tees, elbows, and flanges in corrosive process piping
- Electrolysis plates - stable performance in electrochemical environments
- Marine engineering - condensers, evaporators, and desalination piping
Formability
| Application | Why TA2 |
|---|---|
| Cryogenic fuel system components | Maintains toughness at liquid oxygen (-183°C) and liquid hydrogen (-253°C) temperatures |
| Flanges and fittings | For LOX/LH₂ storage and transfer systems |
| Fasteners | High specific strength and fatigue resistance |
| Hydraulic tubing | Corrosion-free fluid transport in airframe systems |
Medical Devices
| Application | Why TA2 |
|---|---|
| Artificial bones and joints | Biocompatible - no immune rejection, no toxic ion release |
| Dental implants | Resists oral fluid corrosion indefinitely |
| Surgical instruments | Lightweight, sterilizable, corrosion-proof |
Consumer Products
| Application | Why TA2 |
|---|---|
| Titanium cups and bottles | Zero taste transfer, no metal leaching, lightweight |
| Watch bands | Hypoallergenic, corrosion-proof, premium feel |
| Eyeglass frames | Ultra-lightweight, flexible, skin-safe |
| Jewelry and accessories | Non-allergenic, distinctive metallic character |
Why TA2 Is the Default Choice
Among all commercially pure titanium grades, TA2 offers the most practical combination of properties for the widest range of applications:
| Factor | TA2 Advantage |
|---|---|
| Strength | Higher than TA1 - sufficient for most structural and pressure applications |
| Ductility | Still excellent - 25% elongation allows extensive cold forming |
| Corrosion resistance | Matches the best CP grades |
| Cost | More affordable than TA3 and above |
| Availability | The most widely stocked CP titanium grade globally |
When specification requirements do not demand either the maximum formability of TA1 or the higher strength of TA3, TA2 is the rational default - and it covers the majority of CP titanium applications worldwide.
We Supply TA2 Titanium in All Product Forms
Baoji Yibaite New Materials Technology Co., Ltd. is a high-tech titanium processing company in Baoji, Shaanxi Province - China's Titanium Valley.
We stock and manufacture TA2 (Grade 2) across our full product range:
- Titanium plates and sheets - for heat exchangers, vessel linings, structural panels
- Titanium bars and rods - for machined fittings, fasteners, and medical components
- Titanium wires - for springs, filters, and welding applications
- Titanium tubes - for heat exchanger tubing, process piping, and fluid handling
- Titanium strips - for precision-formed consumer and industrial components
Also available:
Gr1, Gr3, Gr5 (Ti-6Al-4V), TC4, TA15, and other standard or custom specifications.
All products ship with full mill test certificates and can be produced to your required dimensions, tolerances, and material conditions.
Baoji Yibaite New Materials Technology Co., Ltd. China's Titanium Valley - Your Trusted Titanium Partner.