Technically, I could just borrow some vague, stock sci-fi term like "durasteel" or something and leave it at that, but I didn't want to do that. As a hard sci-fi fan, I like to think up tech that actually makes sense. So even if I did end up calling my future armor material "durasteel", I still want to define what exactly it is. My first thought was to have it be some kind of nanocomposite. Maybe ceramic nanofibers embedded in a matrix of high impact-strength steel, hence, "durasteel". But then, I considered that using a titanium alloy as the matrix might be a better idea, since it would be lighter which is an important factor in spacecraft and wearable armor. Then I came to the realization that I am by no means a materials engineer and I'm going solely off of a layman's knowledge. So if anyone who's more knowledgeable in this matter could pitch in, that would be neat.