TIG stands for

• A. Tungsten Inert Gas Welding
• B. Tungsten Ion Gas Welding
• C. Tungsten Argon Gas Welding
• D. Tungsten Inert Gas Welding

Answer: (D)

Tungsten Inert Gas Welding uses a non-consumable tungsten electrode and shielding gas that is inert to protect the weld area from contamination. The electrode remains intact while the arc heats the workpiece, and the inert gas (often argon) shields the molten pool from air, preventing oxidation and porosity. This combination lets welders create precise, high-quality welds, especially on thin or delicate metals.

The name described in the option is the standard expansion: Tungsten Inert Gas Welding. While argon is a common shielding gas, the term TIG refers to the use of an inert gas in general, not a specific gas name. The idea of “Tungsten Ion Gas Welding” isn’t used for this process, and naming it “Tungsten Argon Gas Welding” is a more specific description than the accepted acronym, even though argon is frequently used.