Titanium is an isomer of isotopes with a melting point of 1668 ° C. It is a close-packed hexagonal lattice structure below 882 ° C and is called α titanium. It is a body-centered cubic lattice structure above 882 ° C and is called β titanium. Titanium alloys with different microstructures are obtained by adding appropriate alloying elements and gradually changing the phase transition temperature and phase content by using the different characteristics of the above two structures of titanium. At room temperature, titanium alloys have three kinds of matrix structures, and titanium alloys are classified into the following three types: α alloys, (α + β) alloys and β alloys. Alpha titanium alloy It is a single-phase alloy composed of α phase solid solution. It is α phase at normal temperature or at a higher practical application temperature. It is structurally stable and has higher wear resistance than pure titanium and has strong oxidation resistance. At 500 ° C ~ 600 ° C temperatur...