How is GTAW different from MIG welding?

Gas Tungsten Arc Welding (GTAW), commonly known as TIG welding, indeed employs a non-consumable electrode made of tungsten. This tungsten electrode provides the necessary heat to melt the base metals but does not itself become part of the weld. In contrast, Metal Inert Gas (MIG) welding utilizes a consumable wire that both conducts the electric arc and adds material to the weld. This fundamental difference in electrode consumption is a key characteristic that distinguishes GTAW from MIG welding, impacting the quality, control, and application of the weld.

The unique properties of GTAW allow for precise control over the welding process, making it suitable for a variety of metals and applications where cleanliness and high-quality welds are critical. Understanding this differentiation in electrode usage is essential for grasping the advantages and limitations of each welding technique.