The title of a page will always show and is beneficial for readers, search engines and screen reading software that assists people with visual disabilities. We do not recommend completely removing the title.
Some of our themes that show a title over an image have an option when editing the page or post (in the Options box) to show the title below the banner instead of over the banner image. This can be useful if you are using graphics in your banner.
In order to hide the title completely, you would need to add your own custom styling.