TIG or tungsten inert gas is ideal for tricky welds like s-curves, or welds on round things. It produces heat through an arc of electricity jumping from an electrode to the metal surfaces needed to be weld such as aluminum, steel, copper, titanium etc. In TIG welding process, an arc is formed between a non-consumable tungsten electrode and the metal being welded. These non-consumable electrodes are often available in various sizes and lengths. When you buy the best TIG welder, it is typically made of pure tungsten or an alloy of tungsten blended with other elements and oxides. 

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