Tobacco pipes have a few less common mediums.
The first that comes to mind is the clay pipe. It is generally only seen as a long churchwarden style, and is less common today. It was once the only pipe material available to old England and Ireland. Clay pipes are generally not decorated or artistic, and are one single unit, not assembled parts (ie, no seperable stem, bit or bowl). These pipes have a zero break-in time as well.
Cheap wood pipes are also available in department stores. These pipes only have a life expectancy of 5 to 10 months, but are generally priced under $10. These pipes do have a break in time, as a carbon cake does needs to form in the bowl.
(the following is not an individual material, but I feel it warrants mention as it is made from completely different materials)
The hookah is a tobacco pipe, not to be confused with the bong. This pipe is generally sat on a table or the floor and can often be smoked by more than one person. Made of many pieces and filled with a liquid, the exact construction can vary as much as the average tobacco pipe. Hookahs can be made from glass, wood, metal, or any other heat resistant material. The liquid filter can be a liquor, juice, or water, each giving the smoke a unique taste.