What does TIG stand for?

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

Answer: (B)

This question tests what the acronym TIG represents in welding. TIG stands for Tungsten Inert Gas Welding because the process uses a non-consumable tungsten electrode and relies on a shield of inert gas to protect the weld pool from atmospheric contamination. The inert shielding gas—commonly argon, sometimes helium or argon–helium mixtures—prevents oxidation and other reactions as the metal melts. The wording emphasizes the electrode material (tungsten) and the shielding gas (inert) rather than a specific gas like argon or any implication of alloy welding. So, the full form correctly describes both the electrode and the protective gas concept, which is why it’s the best choice. For context, this process is also called GTAW, Gas Tungsten Arc Welding, highlighting the same ideas.