I have been doing research lately on wings for Micro Air Vehicles. The doctoral candidate I am working with has proposed a way to control MAV flight, and needs a workable wing. I have proposed making one out of Titanium, based on a Caltech paper, using masking and etching methods generally used in fabricating Microelectromechanical Systems (MEMS).
In short, what that means is that I mask the titanium and etch away anything that doesn't look like my wing. I am happy with the results. If the titanium is the right thickness and the structural members are designed right, it should have properties similar to a natural flapping wing. I have some work left before I can verify those results, though.
