It is also a huge field. Every engineering field uses materials. Civil engineers even take a class on wood and another on dirt. Electrical engineers have problems with conductor loss due to the angle between the conductor and insulator on circuit boards which they don't even really know about yet. Mechanical engineers just throw some kind of metal in there and hope it works. All sorts of companies chose a plastic because it should work in some specific application better than another plastic. Everything is made out of something and it all takes effort to make. From a solo cup to a computer to a bridge someone had to create a material.
So the next time you design something and choose a material or use some product think about all those hours that some materials scientist spent engineering that material or the process to make that product meet your specifications.