Elder son came over this morning and installed the Galvalume metal roof on the shade awning. He's a sheet-metal guy, so I let him do his thing while I played helper for him. It's been my experience that if someone knows what he's doing, let him do it and grab whatever he tells you to grab. In about two hours, we were done.
It might be susceptible to hurricane, but I don't believe that it will UV. It won't be much protection against sideways, blowing rain, but it's not meant to be. It's shade, and with any luck, it will be there for many years. Thanks, son.