Call ESAB at 1.800.ESAB.123 to find out more. Arc Welding Processes Gas Tungsten Arc Welding (GTAW, TIG) Introduced by ESAB, the GTAW process produces welding heat from an arc between a non-consumable tungsten electrode and the workpiece. An inert gas, usually Argon, shields the arc and the workpiece. Welding consumables, if used, are added ...