I recall an instance when my brother was doing some "modding" for DF.
This "modding" involved catsplosions, of the thermonuclear kind. He added something ridiculous like 150 zeros to the body temperature of cats. When the smoke cleared, there was literally nothing left.
Upon closer inspection, it was discovered that the burning cats exploded, ignited the dwarves, incinerated the dwarves, burned up their clothing, and wore down the bones in the space of less than 100 frames.
Magma does not wear down bones that fast, so in conclusion, higher temperatures burn stuff faster.