When creating a new page, the title is the same as the file name.
As of this date, there currently is no way to split file name from page title.
It’s important that we do not include spaces in a file name, and that we instead use underscores.
Unfortunately, with underscores, we have a strange looking page title that includes underscores, which we can strip using a content editor web part.
This is what the title of this page would look like without the underscores stripped:
Check out the page, and place in EDIT mode.
In the footer of the page, or at the bottom of your site content, insert a Content Editor webpart.
You can find the Content Editor web part under the Media and Content category.
Click on the little triangle in the top right hand corner of the web part, and choose Edit Web Part.
In the Content Link box, copy and paste the following:
Under the Appearance drop down, choose Chrome Style of NONE.
Then click OK and SAVE the page.