1. TIG welding is generally a hand-held welding torch and the other is a hand-held welding wire, suitable for manual welding of small-scale operation and repair.

2. MIG and MAG, the wire is sent from the welding torch through the automatic wire feeding mechanism, suitable for automatic welding, of course, can also be used manually.

3. The difference between MIG and MAG is mainly in the protection of gases. The equipment is similar, but the former is generally protected by argon, suitable for welding non-ferrous metals; the latter is generally mixed with carbon dioxide active gas in argon, suitable for welding high-strength steel and high-alloy steel.

4. TIG and MIG are inert gas shielded welding, commonly known as argon arc welding. The inert gas may be argon or helium, but argon is inexpensive, so it is commonly used, and thus inert gas arc welding is generally called argon arc welding.