TIG stands for Tungsten Inert Gas, after the tungsten electrode, and the sheath of inert gas (argon or an argon mixture) surrounding it.   TIG welding is a commonly used high quality welding process.  TIG welding has become a popular choice of welding processes when high quality, precision welding is required. 

In TIG welding an arc is formed between a nonconsumable tungsten electrode and the metal being welded. Gas is fed through the torch to shield the electrode and molten weld pool.  If filler wire is used, it is added to the weld pool separately.

TIG Welding Benefits

•  Superior quality welds
•  Welds can be made with or without filler metal 
•  Precise control of welding variables (heat) 
•  Free of spatter 
•  Low distortion
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