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<p>Mostly false. Double majors rarely pay off and these two you mention have little overlap, even though the aerospace industry has a lot of use for both. Until you get to the graduate level, the materials side of aerospace engineering is fairly superficial in comparison to materials science. At the graduate level, they are much more related.</p>
<p>my suggestion is to figure out roughly what you would like to do in the aerospace industry and get a degree based on that. It sounds like you are into materials, so doing just a materials science degree honestly shouldn’t hurt you when it comes to getting a job in aerospace, though maybe a few guys on here with more materials experience can clarify that.</p>
<p>Paging RacinReaver…</p>
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<p>There isn’t a field on Earth where it is more common to get a Ph.D. than to not get one. It is a ton of work, doesn’t really net you more money than just a M.S. (on average) and only helps you if you want to pursue research as a career. In other words, there simply is no reason to get one unless you want to do research. If you do want to do research, a Ph.D. may be the way to go, and can lead you into government labs, industrial research groups, academia or a handful of other related places. It doesn’t limit you to only going for a tenure-track position.</p>