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TIG or MIG welding: which one is better?

TIG and MIG are two different welding techniques. Both are very popular but which one is actually better?

Do you have any doubts about which process to use? Understand: TIG or MIG welding, which is better for each case?

In this article, you will learn how to choose between MIG or TIG to do your welding work.

Before understanding the best process for you to weld, understand each one’s basic differences. This will help you when choosing and then provide a quality service.

Both types of welding involve gases. This can already be seen in the names of these: Tungsten Inert Gas and Metal Inert Gas.

MIG welding uses a semi-automatic feeding of a welding wire. This wire passes through the torch to leave the metal in a liquid state. This form of welding uses a short circuit to form the metal puddle.

The MIG weld gas serves to protect the metal pool formed in the electric arc.

On the other hand, the TIG Soldier works as a Tungsten electrode that passes the electric current to the metals to be welded. When the metals reach the liquid state, weld pool, the welder begins to insert the material to weld, that is, the rods for TIG welding.

Important differences in TIG and MIG welding:

To choose which welding process to use, you have to take into account some factors such as:

  • • Welding experience;
  • • What materials will you work with;
  • • How much time do you have to complete the job;
  • • How much money to invest.

The two welding processes have different ways of being performed and also in the operation of their equipment.

We can start with the basic power difference of the welding process:

  • • MIG:
  • • involves wire feed connected to an electrode that melts along with the project.
  • • TIG:
  • • involves a Tungsten electrode, through which a current passes to the metals you want to weld.

Here we already have another important difference between TIG and MIG welding:

  • • In the MIG welding process, the welder uses only one hand, because the wire feed works with the trigger on the torch.
  • • TIG welding requires the welder to use two hands, one for the torch, one for the rod, and sometimes a pedal to control the current going to the torch.

You will now see the specific differences between TIG and MIG welds:

Technical Aspect

This is one of the most striking differences: while in MIG welding, the wire is fed by a trigger on the torch, in the TIG process, it uses a rod to feed the weld with one hand and holds the torch with the other. The welding torch is used to fuse metals, and the cutting torch is used to cut metals.


Tig welding, for the reason of the technique mentioned above, can be a little more complicated for those who are already used to other techniques, such as MIG.

MIG welding is more used, one reason being the ease of welding. In the beginning, learning the amperage and settings correctly can take a while, but due to the wire feed , this makes service easier.

The thickness of material to be welded

You can weld thick metals more quickly using the MIG process. Now, if you are working with thinner metals/parts, using the TIG process may be better.

MIG and TIG welding speed

MIG welding is ideal for large projects, with thick parts that require repetitive welding, that is, high productivity.

TIG can offer greater “detail in the weld” and is indicated for jobs that require more punctual welds.


Controlling MIG and TIG welding are different by technique. If you are a beginner, you will find it easier to use the MIG process. More experienced welders can adapt to the TIG process technique more easily, as they have greater skill.


Greater investment in TIG welding equipment is required. So MIG costs are cheaper.

Final appearance

While MIG welding has a more robust appearance, TIG welding appears to be cleaner and “final.”

Which welding technique is better?

Projects to use MIG welding:

  • • Larger projects, with thick metals;
  • • They need continuous welding and high productivity, as the equipment withstands long welding periods;
  • • Continuous welding gives less chance of defects, as it is not necessary to stop and restart the weld at all times;

Projects to use TIG:

  • • Small projects with thinner metals, that is, thinner. It presents a greater need for welding and requires little finishing after welding.
  • • This process can be used on several metals, such as welding aluminium with TIG and copper.
  • • Welding projects that require greater precision and better finishing. This process is also used, for example, in pieces of art.


As you can see, to choose between TIG or MIG welding, you have to know which is best for each case.

You have to consider aspects like the size of the project, the skill of the welder, and how much you can invest.

Also, remember what productivity is required, since MIG welding produces more than TIG. This is because the wire is continuously fed.


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