Fork material is steel and brake calipers were aluminum.
I have no idea, but I do know that my bike flipped over after I got off and kept slipping. The "quick release" part of the brakes must've hit it first.

Actually, I'm quite perplexed as to how the f*** my brakes got hit as well... but it did.

Here's a picture of my brake lever for more serious "huh" factors.

Yes, it's suppose to be a straight 2-finger lever.