Two Japanese sponge titanium manufacturers are Toho Titanium and Osaka Titanium Technology.Price of Japanese sponge titanium for general industrial use (for plate heat exchangers and other expanded materials). Dollars per kg. . MIRU regularly surveys price trends through stakeholder interviews and other means. Premium Grade (Pgrade) is used for aircraft. Sponge titanium for use in steel additives remains at about half the price of S-grade titanium.