The Superman of metals, titanium. Although much lighter than steel and just a third the weight of gold, titanium is incredibly strong and highly resistant to dents, nicks or bending. It’s also hypoallergenic and doesn’t corrode over time. You can find titanium in grey or black, and with beautiful finishes such as satin, frost or high polish. A lot of people favour this pleasantly light metal for their eyeglasses, since you can hardly feel it’s there. If you’re ring-shopping, one little word of caution, however: titanium can’t be soldered or re-joined, meaning that a titanium ring’s size can never be changed.