Titanium is one of the most common metals on earth, but it does not occur naturally in this elemental form. TiO₂, also known as titanium (IV) oxide or titania, is the naturally occurring compound created when titanium reacts with the oxygen in the air. As an oxide, titanium is found in minerals in the earth’s crust. It is also found with other elements, including calcium and iron.

THE OBSCURE HISTORY OF A UBIQUITOUS PIGMENT: PHOSPHORESCENT LITHOPONE AND ITS APPEARANCE ON DRAWINGS BY JOHN LA FARGE

Exposure routes are the pathways that allow ingredients to enter our bodies. Primary exposure routes include: 

Avoiding exposure