Stainless steel and titanium have their own pros and cons. Stainless steel tends to be cheaper than titanium, so the watches end up being more affordable than others. Titanium, on the other hand, is pretty expensive, although it looks and feels great. They're a lot more popular these days, especially with luxury watch brands, because of their durable quality. Titanium watches are scratch-resistant and will last you a long time. Moreover, you'll find that some of the best solar watches out there are made of titanium.