Hide chart title

Are you using a particular heading font in your presentation, or you just need to export the chart without the title?

Click on the "eye" icon (besides the "Document title" in the menu bar) to hide it. Alternatively, use the toggle "Title" on the "APPEARANCE" tab. 

Tip: In this case, also use the option "transparent background" while exporting your chart—it will be easier for you to integrate it into pre-established templates of your presentations.