Garrett, you can burn a nice hole in your glove with an 11mm rope as easily as 4mm titan spectra cord. The trick is to move at a speed you don't have this problem, or attach another biner to the leg loop of your harness and run the rope through that effectively reversing the direction of the belay end of the rope and adding more friction, or bringing the rope slightly behind you so that your jacket or pants take some of the friction and therefore the heat.

The question was raised earlier about rappel devices heating up. They do heat up- theoretically, hot enough to burn a nice divott in your rope or hand. It all depends on the character of the device, rope, and speed on your descent. Knowledge is the key.