Molten Titanium Can Explode in Water.
Metal Prog 1972 Oct; 102(4):1 pages
As with aluminum in water, titanium-water explosions are of three types: (1) moderately rapid expansion of steam; (2) violent release of steam that has built up a high pressure in confinement; and (3) chemical explosions involving exothermic reactions. In consumable- electrode vacuum-arc melting, as used for titanium, the most likely source of water is the cooling water outside of the copper crucible, and leakage of this water to contact molten titanium usually results from penetration of the crucible wall. At least one factor affecting the chance of penetration is the adequacy of arc-gap and arc-voltage control.
Metal Prog., V. 102, No. 4, October 1972, P. 7