Titanium is a popular choice for handles chosen due to its high tensile strength, corrosion resistant qualities and light weight. This is a very strong metal used in many special applications. Many other exotic handles are available which are aesthetically beautiful, but might not be very practical to heavy use. These would include beautiful mother of pearl, the rare elephant ivory - which was once the most sought after material for exquisite handles, Caribou antler, moose horn, petrified wood etc. Many stones like jade, turquoise and others also make good handles, but these are normally heavy and not usable for a working knife.