Go to the Customizer -> Blog Settings.
It is recommended that you have a blog page open, as the changes you make to this page from the Customizer won’t be visible otherwise.
Show post title in post page
You can choose either to show the post title in the post page or not to show the respective title.
To enable this option, check the checkbox.
Instead, if you want your readers to fully plunge into the text of the article, leave the checkbox unchecked.