All engines run hot (to touch). TT's PRO 46 ordinarily runs just like any O.S. engine, and many would argue "even better".
It sounds like you haven't got enough oil in your fuel, probably too much nitro and possibly too hot a plug.
Stick it on the bench. Fit a Bolly 10.5x5 or APC 10x6, use a fresh container of fuel containing no more than 5% nitromethane, a minimum of 18% oil which for initial running in (first half dozen tankfuls) is preferably all degummed castor, fit an O.S. #8 or equivalent heat range quality plug (eg: Enya #4), open the needle valve 3½ to 4 turns, prime (4-6 choked rotations with throttle open wide) and start. Remove the ni-starter and close the needle valve until the engine just breaks into a (rich) two stroke. Run for 5-10 minutes, leaning out testing and adjusting idle mixture for smooth transition as required. When it'll hold a constant two strokem idle and transition smoothly, shut down, stick it in your plane and fly. IME, TT's will usually do this OOTB. If I stick them on the bench at all, it's just to give them an initial run to set up the N/V and adjust idle/transition, sort out any problem (never does with TT) should one appear before putting it in a model. I have 4X TT PRO 46s. The word "runs like a Swiss watch" cliche' comes to mind. Pure platinum.