TIP TIG, Titanium welding made simple. The ability of a weld process can be judged in the weld results attained with complex alloys, and there is no alloy more complex than Titanium.
When welding any alloys, and especially titanium welding with the manual TIG or the automated Hot Wire TIG process, there is always concern about the weld oxidation. Weld shops evaluate the finished titanium weld quality by the untouched color of the completed weld. A silver color with an untouched titanium weld is the first choice. Regular manual TiG welds on Titanium parts >3 mm are carried out at typical TIG weld speeds in the 2 to 5 inch/min range. The slow TIG weld speeds will create high temperatures and the solidified weld that trails the gas cup may be at temperatures that exceeds 700F. Once above this temperature the titanium, welds can result in oxidation reactions with the atmosphere. Those reactions will ruin the titanium properties creating costly scrap.