TIG welding is a versatile process, capable of handling all sorts of different metal, and can be used to join very thin sections. Tungsten inert gas (TIG) welding involves principles common to both MIG and oxyacetylene welding. The gas shielding used in MIG welding is also used in TIG welding with a compressed gas cylinder attached to the unit.
Put simply, welding is a process that uses heat to join metal to create a strong bond. The heat, commonly generated with an electric arc or gas flame, needs to be hot enough to melt the metals being welded. the melting process is usually accompanied by a filling process, where additional metal is added to make a strong joint.