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Differences Between Mig and Tig Welding

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Welding is a manufacturing process that involves joining materials, main metals at higher temperatures than those used in brazing and soldering. There are various types of welding which include Arc welding, gas welding, TIG welding and MIG welding. We shall focus on MIG welding and TIG welding and their differences.


TIG-It is an acronym for Tungsten Inert Gas. It is a type of arc welding-joining of materials using heat from an electric arc. It is also called Gas Tungsten arc welding.

MIG-It is an acronym for Metal Inert Gas.MIG welding is a subtype of Gas Metal arc welding. Another type of Gas metal arc welding is the MAG-Metal Active Gas welding.

Differences between MIG and TIG welding

  1. MIG welding can be used to join both thick and thin materials while TIG welding is used to join materials that are thin in gauge. As a result, MIG welding consumes more power than the TIG welding.
  2. MIG welding is easier to learn and carry out as compared to TIG. The hardness in learning of TIG welding is attributed to the fact that the welder has to learn how to maintain closer tolerances between the workpiece, filler rod, and the electrode. As a result, MIG is recommended for welding beginners while TIG can be used by experienced welders.
  3. TIG welder machine can be used to join many different kinds of metals while the MIG welder has a limited number of metals that it can join. This is because MIG welding was purposely developed to join non-ferrous metals though it is still used to join steel while TIG was developed to join all types of metals and metal alloys.
  4. MIG welder machine is faster than the TIG welder machine. As a result, it is more common to come across MIG welding than TIG welding.
  5. MIG uses a feeding wire that is long and continuous while TIG uses long welding bars that are fed into the puddling.
  6. TIG welding can be carried without a filler metal because a section of a metal can melt into another while MIG requires a consumable filler metal.


Both TIG and MIG welding utilize an electric arc to weld and a shielding is required when carrying out both processes. However, there are key differences between the two processes as discussed above. The choice of the method to use will largely depend on the materials you are joining. Next time you are asked “What is the difference between TIG and MIG welding”, you will have something to say!

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