[DiapDealer]

While you're definitely grammatically correct. "Titlecase" is what this particular feature is called in various automated routines ... such as regex. The function capitalizes the first letter of every word with zero regard for filtering words that wouldn't typically be capitalized. In the world of grepping and regexping, "Titlecase" is the familiar terminology for the function being provided. I personally think "Capitalize" would probably confuse more people than it would help.