Hello Tim,
Thanks for writing to us.
By default, X Theme does not provide an option to hide the post title. You can hide it by adding custom CSS.
Navigate to:
Cornerstone → Theme Options → Custom Code → Global CSS
Then add the provided CSS code.
article.post header.entry-header .entry-title {
display: none;
}
The purpose of providing custom CSS is to show you how to add CSS code to your site. Writing custom CSS is outside the scope of our theme support. If you need more customization, you need to learn CSS and learn how to use the browser’s element inspector, or you can subscribe to One where customization questions are answered.
Hope it helps.
Thanks