Originally the process was evolved in America in 1940 for welding in the aircraft industry. It developed into the tungsten inert-gas shielded arc process which in turn led to shielded inert-gas metal ...

TIG welding (also called Gas Tungsten Arc Welding, GTAW) involves striking an arc between a non-consumable tungsten electrode and the workpiece. The weld pool and the electrode are protected by an ...