Materials (For the purposes of styling tools):

Ceramic: Durable and smooth, ceramic is a natural source of negative ions and emits far infrared heat. Leaves hair smooth and shiny.

Titanium: Highest thermal conducting metal. The best for retaining heat.

Tourmaline: A mineral, and similar to ceramic is a natural source of negative ions and far infared heat.

Silver: A purifying agent. Low contact resistance reduces friction for gentler styling.