Wikipedia
Aquamelt
An aquamelt is a naturally hydrated polymeric material that is able to solidify at environmental temperatures through a controlled stress input (be it mechanical or chemical).
They are unique in being able to “lock in” work applied to them through an alteration in hydrogen bonding, which enables them to be processed with approximately 1000 times less energy than standard polymers. This has been recently shown for an archetypal biopolymer, silk, however the mechanism for solidification is thought to be inherent to many other biological materials.