Shop Weldfabulous for TIG welders. Tungsten Inert Gas (TIG) welding process employs a tungsten electrode, in conjunction with shielding gas to create a weld and protects the weld from contamination. Filler metal is optional in the TIG welding process, depending on your application. TIG welders are usually used when precision and the visual aspect are critical. TIG welding produces very little smoke and no spatter.