Well... It's at least realistic in that we're trying to find ways to do fusion without it being too destructive IRL. Have you tried layering CRMC, TTAN and QRTZ with the console?
But yeah... Might be useful having a variety of building materials. Or maybe a material with limits set by tmp and tmp2 (to determine max temp and pressure), like a variable strength material? Of course, I don't know how well that would work in TPT, how laggy it'd be, how hard it would be to make...

You seem to forget about Tungsten and Vibranium.

Together with other materials (as well as active cooling) Vibranium can easily contain your fusion (however it will not sustain itself.)

@Potbelly (View Post)

 I know that. You can have a limited time usage on it by cooling it with LN2.

It is also the only material that even remotely fulfills what you are looking for.