Titanium is essential material which is used for the Aerospace engineering requires advanced techniques. Its strength, corrosion resistant, and durability, is very suitable for hanko material which can be used for a long term. Titanium is also used as allergic free material in health field for artificial bone, artificial root of a tooth, and heart pacemaker. It is not only durability, but also body friendly metal. When you hold it in your hand, you can feel the heavy weight of the metal. The wood hanko weighs about 20 grams, but the titanium hanko weighs about 80 grams.
round hanko (18mm / 0.70inch)
square hanko(21mm / 0.83inch)