Diamond.
Titanium is useful because it's extremely strong for its weight. That's why it's often used in aircraft.
Also, Titanium's high flexibility is helpful in some uses. Diamond is not at all flexible, and will break before it bends even a little.
Diamond is already a solid: it is the hardest mineral known.
A diamond
The name of the hardest solid is a diamond; it is the hardest object known to humankind.
Diamond is often considered one of the hardest naturally occurring materials in the world. However, a synthetic material called aggregated diamond nanorods has been found to be even harder, making it one of the hardest solids known to date.
diamond is the strongest solid; almost impossible to break (:
Diamond is the hardest materail in the world
Yes, diamond is the hardest mineral on earth.
The hardest naturally occurring substance is called diamond. It is a form of carbon.
Diamond has an extremely strong covalent bonding between carbon atoms; today diamond is not considered the hardest material, Today the hardest material is Aggregated diamond nanorods.
Probably titanium since it is a metal, which means it is flexible and soft, while a diamond is solid and unaltered by stress or other factors, until breaking.
Diamond
Diamond is the hardest precious stone