Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a non-consumable tungsten electrode to produce the weld. The weld area and electrode is protected from oxidation or other atmospheric contamination by an inert shielding gas (argon or helium), and a filler metal is normally used. 

Advantages of TIG welding: detailed precision, various applications and positions, extremely complex metal welding, non-consumable electrodes. TIG welding produces cleaner and more precise welds than MIG welding or other Arc welding methods, making it the strongest.

 

But there is Disadvantages of TIG welding; time-consuming process, more complicated appliances, safety issues, cost of inert gas, Deposition rate and welding speed.

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For melting the fillet material fast and smoothly also heading fillet material and we call it hot wire. But even use hot wire GTAW welding can not go faster with hotwire can get goot welding maximum 350mm/min. So GTAW welding quality best but slow. So WilClad Technologies focus on last 6 years and for go fast and more quality working on  Dual Tungsten and Dual Power Source Technology