TIG welding is the abbreviation for which welding process?

• A. Torch Inert Gas welding
• B. Tin Inert Gas welding
• C. Tungsten Inert Gas welding
• D. Tungsten Ion Gas welding

Answer: (C)

Tungsten Inert Gas welding is what TIG stands for. This process uses a non-consumable tungsten electrode to make the arc, while the weld area is protected by an inert shielding gas (usually argon, sometimes helium) to keep air from reacting with the molten metal. Because the shield gas and the precise control over heat allow very clean, high-quality welds, TIG is ideal for thin sections and non-ferrous metals like aluminum, stainless steel, and titanium. The other options aren’t correct because they replace the tungsten electrode with a torch or use the wrong gas terminology, which doesn’t reflect how TIG actually works.