Tungsten Inert Gas Welding is an advanced type of welding. TIG Welding is used when high-quality welding is required. In this welding, a non-consumable tungsten electrode is used as the name says. An arc is generated between the workpiece and the tungsten electrode to initiate the process of TIG welding. The arc provides heat to the workpiece that melts the base metal and later on fused and welded.