UNS No. R 54521 is the weldable high-strength titanium-base alloy. It combines high strength at elevated temperatures with excellent welding characteristics. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ti-91. Producer or source: Titanium mills.