Do titanium rings require maintenance? The short answer is no. Titanium rings are tarnish-proof, extremely corrosion-resistant, and one of the most durable metals known to humankind.
That said, titanium is not invulnerable, and can be affected is a number of ways. The most common issue is a titanium ring becoming dirty. In this event, simply use any household cleaning product, such as dish soap or window cleaner, rinse with water, and dry with a towel. Due to titanium's corrosion-resistance, you don't have to worry about ruining the facade with any household chemicals (in fact, only the most concentrated acids can affect it).
Titanium rings with high-polish finishes are more prone to scratches if a scrape or impact is severe enough. If this happens, you may have to have your titanium ring polished - fortunately, however, all the solutions are low-cost. Click here to have your titanium ring re-polished. You can also try a cream metal polish if the problem is not severe.
Be warned, however, that certain titanium ring types must be handled with caution. They are: anodized (colored) rings, inlayed (or two-tone) rings, and stone-set rings. In general, it is better to clean these with a half-ammonia (such as Windex), half-water solution and soak for several minutes. Air dry on a soft towel and repeat as necessary until clean. The need for caution with these ring types is not to protect the titanium, but the other metals, gems and oxide layers.