Titanium alloy is a lightweight, high-strength, corrosion-resistant metal. Aviation titanium alloy is mainly used in aircraft structural parts, aero-engine structural parts and aviation fasteners. Aircraft structural titanium alloy use temperature requirements are generally 350 ℃ or less, the requirements of its high specific strength, good toughness, excellent fatigue resistance, good welding process performance, etc., the main application parts of the landing gear components, frames, beams, fuselage skins, heat shields and so on.