If you let your imagination run wild, you can probably think of hundreds, perhaps thousands of manufacturing materials. Companies use all sorts of materials, including latex rubber, electronics, sheet metal, wood, human plasma, seaweed, titanium wire, and even alligator blood. That's some list! You won't be able to look at every material, but this lesson will cover the basic ones—metals, ceramics, polymers, and composites. It will start by discussing the nature of materials. Then, it will move on to their mechanical and physical properties and talk about dimensions, tolerances, and surfaces.