Vitrification

noun

1. Conversion into glass, or in general into a material having a glassy or vitreous structure.
2. Same as vitrifaction.
3. A process of converting a material into a glass-like amorphous solid which is free of any crystalline structure, either by the quick removal or addition of heat, or by mixing with an additive.
4. a vitrified substance; the glassy result of being vitrified
5. the process of becoming vitreous