Method of welding titanium alloy parts with titanium insert.
A method of welding opposite end surfaces of two titanium alloy parts (10, 12) kept in alignment by a high energy-density welding process such as electron beam welding, laser beam welding or TIG arc welding, characterized by closely interposing an insert member (14) of either practically pure titanium or Ti-Al binary alloy containing up to 3 Wt% of AI. Owing to thorough alloying of the inserted titanium (14) with the constituents of the fused base metal (10, 12), the weld metal (16) in a weld joint obtained by this method is sufficiently high in both strength and toughness. By an optional postwelding heat treatment, the strength of the weld metal (16) can further be enhanced.