What kind of metal is typically used in TIG welding?

TIG welding, or tungsten inert gas welding, is a versatile welding process that is often employed for a wide range of materials. The best option reflects this versatility, as it acknowledges that both non-ferrous metals, such as aluminum and copper, and certain ferrous metals, like stainless steel, can be welded using TIG techniques.

This process is particularly favored for its ability to produce clean, high-quality welds with good control over the heat input, which is crucial for welding thinner materials. The use of a filler rod in many cases enhances the joint strength and allows for more complex welds. TIG welding is unique because it can produce welds without filler metal when appropriate, but it's often combined with filler rods to achieve the desired results.

The other choices narrow down the scope unnecessarily. Ferrous metals only, aluminum only, or exclusively metal alloys do not encompass the full range of materials that can be effectively welded using the TIG process. By recognizing option B, you acknowledge the broad application of TIG welding across various metal types, ensuring understanding of its capabilities in the welding industry.