Cooking pots are made of metal for efficient heat conduction, but have wooden handles to prevent heat transfer to the user's hand because wood has low thermal conductivity while metal has high.
The reason some cooking pots are made of metal, but their handles are made of wood is that wood has low thermal conductivity, and metal has high thermal conductivity. Metal is used for the pot itself because it is a good conductor of heat, which is beneficial for cooking. Metals such as copper, aluminum, gold, and silver have many free electrons that transport thermal energy efficiently, making them excellent materials for the main body of cooking utensils. However, since metal handles would become very hot and could burn the user, wood, which is a poor heat conductor, is used for the handles to prevent heat from easily transferring to the person's hand.