At what temperature does titanium become a gas?

Titanium will turn into a liquid state at 1941 K

It will then boil at 3560 K but it is sill Titanium at both these temperatures,

you can put a blowtorch to it for a year and it will still be titanium just in a different state.

However if you want to get titanium into a state where it breaks down into something you can no longer call Titanium you need to think about temperatures like Plank temperature (absolute hot) which is predicted to be around 1.41679 × 10^32 K or absolute zero which unsurprisingly is 0 K , anything beyond these temperature ranges will do funny things to the atomic structure not to mention space and possibly time too.