Titanium is a reactive metal that is sensitive to embrittlement by oxygen, nitrogen and hydrogen at temperatures above 500°F. This can be provided by shielding the metal with high purity inert gas or in a chamber. Cleanliness of the joint is a major factor in producing porosity free welds. Protection of the wire at all times is required to assure cleanliness.
Can be fusion welded to Zirconium, Tantalum, Nobuim and Vanaduim. Should not be fusion welded to Copper, Iron, Nickel and Aluminum, as it will produce extremely brittle welds.