Tungsten inert gas (TIG) welding uses a non-consumable tungsten electrode that delivers the current to the welding arc and is used on less-forgiving materials, such as stainless steel alloys. The weld area and electrode are protected from oxidation or other atmospheric contamination by an inert shielding gas.

TIG welding takes longer than MIG or stick and requires a skilled welder due to the coordination between moving the torch and feeding the rod in at the same time.