I had a materials science course as part of my ME undergrad. (And of course there was overlap in other courses.)
When I went to grad school for a Master's at an engineering school which, at the time, was small enough to not actually have formal departments, I studied a fair bit of mechanical engineering but actually did a materials science thesis.
When I went to grad school for a Master's at an engineering school which, at the time, was small enough to not actually have formal departments, I studied a fair bit of mechanical engineering but actually did a materials science thesis.