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There are many welding processes for titanium alloys, including argon arc welding, submerged arc welding, vacuum electron beam welding, etc. Argon arc welding is suitable for titanium alloys with a thickness of less than 3 mm, while titanium alloys with a thickness of more than 3 mm require melting electrode argon arc welding. When welding, argon gas with a purity of no less than 99.99% needs to be used, and the content of air and water vapor in the argon gas must be strictly controlled. At the same time, the titanium alloy needs to be surface treated to remove oil stains, oxide scales, and oxide films before welding to ensure welding quality and safety.

Because titanium alloys are highly chemically active and easily contaminated by oxygen, nitrogen, and hydrogen, they cannot be welded by arc welding, oxyacetylene (or oxypropane, etc.) gas welding, C02 welding, and atomic hydrogen welding.