Titanium in Hydrogen Storage Materials‌
As one of the four major hydrogen storage metal series, titanium-based materials are relatively low-cost. However, the ideal "hydrogen storage metal" remains undiscovered. Once resolved, hydrogen could become a mainstream fuel.

‌Titanium in Artificial Bones‌
Titanium revolutionizes orthopedic surgery. Titanium implants (screws/plates) allow bone regrowth into their porous structures, integrating with muscles and tissues. It is dubbed the "biophilic metal," used in knees, shoulders, ribs, skulls, heart valves, and bone clamps.

‌Titanium in Sensors‌
Barium titanate (BaTiO₃) crystals are key in ultrasound devices and sonar systems. They generate electricity under pressure (measuring ultrasound intensity) and produce ultrasound via electrical currents.

‌Titanium in Aviation‌
"Titanium planes" reduce weight by 5 tons, increasing passenger capacity by 100+. Titanium alloys comprise 18-25% of jet engines and 95% of supersonic airframes (e.g., SR-71 Blackbird).

‌Titanium in Coatings‌
Titanium dioxide (TiO₂), a non-toxic white pigment, combines the opacity of lead white and durability of zinc white. 1g covers 450 cm². Annual production exceeds millions of tons.

‌Titanium in Military‌
Titanium tetrachloride (TiCl₄) releases dense white smoke in humidity, used as a naval smoke screen to block enemy visibility.