Final answer:
Chemical degradation is the technical decontamination process that uses a material to change the chemical structure of a hazardous material, breaking it down into benign substances.
Step-by-step explanation:
The technical decontamination process that uses a material to change the chemical structure of a hazardous material is chemical degradation. Chemical degradation involves breaking down the hazardous material into benign substances through chemical reactions. For example, if a hazardous chemical is converted into a non-toxic compound through a chemical reaction, it can be safely disposed of or rendered harmless.