Well, Titan is fairly easy to manage, heat wise. There's a rotary compressor in there, but at -50?C it will pretty much run in vacuum which will essentially kill the compressor. Plus all that cold on the memory will most likely coldbug the hell out of it. You will loose more with cold on the Vmems than you will gain with the cold on the GPU. This is why we normally run GPU only direct-die evaporators.

Better off building one by yourself or picking up pre-made unit by a renown builder.