Final answer:
The correct formula for titanium(IV) sulfide is TiS2.
Step-by-step explanation:
The correct formula for titanium(IV) sulfide is TiS2.
Titanium has a +4 oxidation state, which means it can form a stable compound with sulfide ions (S2-). The chemical formula for sulfide is S, so in order to balance the charges, two sulfide ions combine with one titanium ion, resulting in the formula TiS2.