Welding method of titanium alloy T abut-joint deep J welding joint

The invention discloses a welding method of a titanium alloy T abut-joint deep J welding joint. The welding method is suitable for titanium alloy welding, according to titanium alloy welding, a titanium cylinder is higher than a round titanium plate by more than 15 mm, and the depth h of the T abut-joint J welding joint is 15 mm to 25 mm. The specified specification of a nozzle and a tungsten needle is selected, and the specified diameter of a welding wire are selected, through large current arc heating, bending is carried out, the welding parameter in the above fourth step is adopted for welding, the structures on the two sides of the welding joint are used for forming an inert gas protection area, and manual tungsten inert gas arc welding of the T abut-joint deep J welding joint is finished. The problems that the conventional manual argon tungsten arc welding is adopted for welding the T abut-joint deep J titanium alloy welding joint, welding application is difficult, after welding,the welding joint is seri