Tungsten Inert Gas Welding (TIG) is a welding process that uses a non-consumable tungsten electrode to produce the weld. An inert gas, usually argon, shields the weld area from contamination, ensuring a clean and strong joint. This method is known for its precision and ability to weld thin materials. TIG welding is versatile and can be used on various metals, including aluminum, stainless steel, and copper. It requires a skilled operator to control the heat and filler material, making it ideal for applications where high-quality welds are essential, such as in the aerospace and automotive industries.