Titanium has low density and high strength. It is corrosion resistant in seawater, aqua regia, and chlorine. Titanium is known for its high strength-to-weight ratio. It is a strong metal with low density that is quite ductile. Titanium Grade 2 is a widely used grade that offers excellent corrosion resistance, superior formability and strength between grades 1 and 3. Titanium Grade 5 has very high strength, good corrosion resistance, excellent strength to weight ratio, high strength at cryogenic temperatures, good weldability, etc.