Titanium alloy refers to a variety of alloy metals made of titanium and other metals. Titanium is an important structural metal developed in the 1950s. Titanium alloy has high strength, good corrosion resistance and high heat resistance. From the 1950s to 1960s, it was mainly the development of high-temperature titanium alloys for aeroengines and structural titanium alloys for airframes. Hundreds of titanium alloys have been developed in the world, including 20 ~ 30 most famous alloys, such as Ti-6Al-4V, ti-5al-2.5sn, Ti-2Al-2.5Zr, ti-32mo, Ti Mo Ni, Ti PD, SP-700, ti-6242, ti-10-5-3, Ti-1023, BT9, BT20, imi829, imi834, etc Titanium is an isomer with a melting point of 1668 â?? and a close packed hexagonal lattice structure below 882 â?? �± Titanium; It has a body centered cubic lattice structure above 882 Titanium. Based on the different characteristics of the above two structures of titanium, appropriate alloy elements are added to gradually change the phase transformation temperature and phase content to obtain titanium alloys with different structures. At room temperature, titanium alloys have three kinds of matrix structures, and titanium alloys are divided into the following three categories: ± Alloy ±) Alloy and Alloy.