Will the turtle shell explode when heated locally?

Tortoise shell may crack when heated locally.

Turtle shell is mainly composed of keratin and calcium, which has high strength and toughness, but it is not a completely uniform material, so when it is locally heated or stressed unevenly, it may lead to cracking of the shell.

For example, when a turtle shell is heated on a fire, it may crack due to uneven heating. However, it should be extremely rare for a turtle shell to burst.