Difference Between TIG and MIG Welding

Welding is very crucial process to join metal parts. Various welding techniques are available to join metal parts. Using right welding technique ensures product performance in extreme working conditions. MIG (Metal Inert Gas Welding) and TIG (Tungsten Inert Gas Welding) are very popular techniques. In this article we will discuss the difference between TIG and MIG welding.

TIG and MIG welding both use electric arc in the presence of inert gas to create the weld. Both techniques have their own advantages and limitations. Choosing the right technique for an application ensures manufacturing of quality products. Following points are considered for the selection of welding process:

  1. Parts Thickness
  2. Dissimilar welding materials
  3. Required Weld Quality
  4. Metal Electrical Conductivity
Welding Process

MIG welding utilizes feed wire that constantly moves through the gun to create the spark, then melts to create the weld.

TIN welding uses a non-consumable tungsten electrode to form the arc. The filler material is added separately if required. This allows the welder to precisely control the speed and depth of weld.  

Base Material

MIG welding has the advantage over TIG welding because the feed wire works as electrode and filler rod. Therefore, thicker parts can be welded together without heating them to their melting temperature throughout. 

TIG welding can be used to weld two different materials as well because it utilizes filler rod. 

MIG welding is the best option Very thick and heavy duty welds. However, for thin metal pieces TIG welding is a more effective solution.

Weld Quality

TIG welding produces finer and clean welds compared to MIG welding. TIG welding can also weld very thin materials.


MIG welding process is much faster compared to TIG welding. This makes MIG welding a more cost effective solution. MIG welding equipment are also less expensive and readily available compared to TIG welding equipment.

Ease of Use

MIG welding is easier to operate. On the other hand, TIG welding requires specialized techniques. In this operator has to use both hands and one foot.


High precision can be achieved using TIG welding because welder in TIG welding has more control over gun and heat produced during welding.

Welding Speed

A MIG welding gun is designed to continuously work for long periods of time, making them more efficient and productive. However TIG welding is much slower process.

Weld Strength

TIG welding produces high strength welds compared to MIG welding


TIG welding is a cleaner process compared to MIG welding Welder control on filler material eliminates the spatter produced during welding. MIG welding produced more smoke, fumes and sparks


Properties TIG Welding MIG Welding
Electrode Type Non-Consumable Electrode Consumable Electrode
Base Material Dissimilar materials can be welded. Only similar materials can be welded
Weld Quality Produces Finer and clean welds Weld quality is not as good
Cost High Cost Low cost compared to TIG welding
Ease of Use Expertise is Required Easy to Operate
Precision High Precision can be Achieved Used to heavy welding work.
Welding Speed Slow Process More Efficient and Productive
Weld Strength Low Strength compared to MIG Welding High Strength


To sum up, MIG welding is typically better for heavy duty welding work where larger thicker pieces of metal are being joined. However TIG welding can work best for joining smaller pieces of metal. TIG welding can also join two pieces of metal without filler rod.

Read this article to know various sheet metal joining operations. 

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