The classification of titanium alloys is primarily based on alloy composition and phase-transition temperatures. The mainstream categories are broadly divided into three major types: α-type, α+β-type, and β-type. Additionally, there are pure titanium grades that serve as the foundational category. Domestically, titanium grades follow the TA (α-type/pure titanium), TB (β-type), and TC (α+β-type) system. Internationally, standards such as ASTM, AMS, and DIN are commonly used. Strength, ductility, corrosion resistance, and weldability vary significantly among different grades. Below is a comprehensive list of mainstream grades—both domestically and internationally—along with detailed classifications, covering all sectors including aerospace, chemical processing, medical, and civil applications.
Core Summary of Titanium Alloy Grades
Alloy Type Core Representative Grade Core Advantages Main Application Areas
Pure titanium grades TA1 and TA2 offer excellent corrosion resistance and superior ductility, making them ideal for basic components in the chemical, civil, and medical industries.
Alpha-type TA7, TA9, and TA10—high-temperature and highly corrosion-resistant materials for high-temperature components in the chemical and aerospace industries.
α+β TC4 (Ti-6Al-4V) and TC11 offer the best overall performance and are heat-treatable. They are widely used in aerospace, medical, automotive, and general mechanical applications.
Type β TB5 and TB6: Ultra-high strength, excellent cold-workability—suitable for high-end aerospace structural components and fasteners.
Quick Selection Guide
1. Civil/Chemical Applications: Prioritize TA2 (general-purpose) and TA10 (strongly corrosive);
2. Aerospace applications: The core materials selected are TC4 (general-purpose), TC11 (high-temperature components), and TB6 (landing gear).
3. Medical implant applications: TA1 and Ti-6Al-4V ELI (TC4 ultra-low interstitial grade) are the preferred choices;
4. Highly corrosive environments: Focus on selecting TA9 (resistant to seawater/hydrochloric acid) and TA10 (resistant to reducing acids).
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