TIG stands for Tungsten Inert Gas, and is also known as Gas Tungsten Arc Welding (GTAW). It is an electrical process, where an arc is struck between the work piece and a non-consumable tungsten electrode. A metal rod or wire of filler material is held to the molten surface of the work piece, while an inert shielding gas protects the work piece and filler from impurities and oxidation.
Uses and Benefits of TIG Welding
TIG welders have a foot control for manipulating the heat of the arc. The precise control of temperature produces a precise weld. TIG can be used at lower amperages for thinner metal and exotic metals. It can be very slow with thicker metal, however.