Is this something one may study in college?
Yes and no. Trying to build a functional fusion reactor is a cross-disciplinary task that ropes together experts from many fields. Studying physics will give you an elementary understanding of the situation, but it will take a team of specialists to actually succeed.
oops didn't clarify, I was talking about materials science.
It's sometimes called "Applied Physics" or "Applied Engineering". As you can see here, they're very much in bed together, but "materials science" retains its own specialized curriculum. To the Google with you! And yeah, honestly, if you got a degree in materials/applied science, you'd never be out of a job, but your job could be pretty boring.
Makes sense, don't worry I'm googling my butt off, I just wanted some Hubski insight for context :) thanks! I'm looking to stay on track in terms of learning (and still being interested in) physics so I can major in it as an undergrad. Sounds like I've got a good bit of opportunity to work with if I take that route.