Abstract:The composition of the match welding wire of Ti-75 alloy has been studied.Some properties of the welding joint and the weld line have also been investigated, such as mechanical properties, fracture mechanics, stress corrosion and general corrosion. In addition, welding experiments for the imitative structure component have been carried out. The results show that the chosen composition of the welding wire is reasonable and the synthetic properties of the welding joint are better. That is to say, the wire is an ideal match welding solder.