Inexpensive fiberglass and aluminum doors also are available. Like steel, aluminum can be finished with faux wood finishes. It won't rust, crack or chip. However, aluminum dents more easily than steel.
Fiberglass doors have a more contemporary look and are resistant to corrosion. They also can be translucent, so they let in light without being transparent. However, they may crack and become discolored over time, and they offer poor insulation.
There are also garage doors made of polycarbon, glass and other materials that may be stronger and more fade-resistant, but more expensive, than fiberglass.