[2] Titanium(III) sulfide is a black powder[1] that can also be crystalline or shiny.

[2] The crystal has the nickel arsenide structure (hexagonal close-packed), with a coordination number of 6 for titanium.

[1] Titanium(III) sulfide is air- and water-stable at normal temperatures and unlike titanium disulfide does not give off an odor of hydrogen sulfide.

In hot sulfuric acid, Ti2S3 first forms a blue-gray slurry and then a colorless solution, while in cold concentrated sulfuric or nitric acid it forms a green-colored solution.

With hot hydrochloric acid it forms hydrogen sulfide.