TIG (Tungsten Inert Gas) welding is a welding process that uses a non-consumable tungsten electrode to produce the weld. An inert gas, usually argon, protects the weld area from contamination by the atmosphere. This method is known for its precision and ability to weld thin materials, making it popular in industries like aerospace and automotive. In TIG welding, the welder can control the heat and filler material separately, allowing for high-quality welds. It is suitable for various metals, including aluminum, stainless steel, and copper. While it requires skill and practice, the results are often clean and aesthetically pleasing.