Final answer:
Metals such as copper, gold, and silver do not experience a ductile-to-brittle transition, meaning they remain ductile even at low temperatures.
Step-by-step explanation:
In physics, metals that do not experience ductile-to-brittle transition include copper, gold, and silver. These metals are known to be ductile, meaning they can be stretched into wires without breaking. They do not become brittle, or prone to fracture, even at low temperatures.