Titanium alloy with its low density, high strength, high fatigue and corrosion resistance and good specific strength and other excellent properties, in modern industry, especially in aviation, aerospace, plays an important role.Titanium alloys can work at temperatures above 600E.In the same operating temperature range, compared with steel, nickel alloy, aluminum alloy, titanium alloy specific strength is much higher.At present, the Ti-CU-Ni and Ti-Zr-Cu-Ni alloys are considered to be the best solders, especially for the joints under high temperature operation and highly corrosive environment.