A welding torch is a tool used to join materials, typically metals, by melting them together. It produces a focused flame or arc that generates high temperatures, allowing the edges of the materials to fuse. Welding torches can be powered by various fuel sources, including acetylene or electricity, depending on the welding process being used. There are different types of welding torches, such as oxy-acetylene torches and MIG (Metal Inert Gas) torches. Each type is designed for specific applications and materials. Proper safety measures, including protective gear, are essential when using a welding torch to prevent injuries.