Screws can be made from all sorts of materials, yet there are some that are more popular than the others. The four most common screw materials are:
Steel: This is by far the most common material used for manufacturing screws, and there’s a simple explanation for why — steel is less expensive than some other screw material options.
Copper: Copper screws are good for fighting against corrosion. If a screw is going to be exposed to the elements, copper helps to ensure the screw performs durably over the long-term.
Aluminum: Aluminum isn’t as durable as other materials, but it does have one thing going for it — its weight. Aluminum is just about the lightest weight fastener you can find.
Titanium: When you need a blend of strength and lightness, go with titanium. You’ll often pay a premium for titanium screws, but that extra cost pays off big time when you need a fastener that is robust but doesn’t weigh much.