Ring. 
Titanium is gaining popularity as a metal for jewelry because many people who are sensitive to other metals do not react to titanium.  It's also a cool-sounding metal which probably helps with the guy market.  This is a really cheap ring from eBay: Until I get it tested I'm only about 80% sure it's real titanium. 
Source: eBay seller kikitbw 
Contributor: Theodore Gray 
Acquired: 25 July, 2003 
Price: $16 
Size: 0.75" 
Purity: 99.5%
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