You can easily edit or delete the title of an image in WordPress by following the steps below.
Edit image title WordPress
- Log into WordPress
- Click on the 'Media' tab.
- Click on the image you want to edit or delete the title for.
- Edit the 'Title' field to be whatever you like and click the 'Save All Changes' or 'Update Media' button.
- Some themes may not actually let you delete the title since it's a requires attribute, but you can put a blank space in it's place. Insert this HTML mark
Javascript | copy code | ? into the 'Title' field to make it appear as a blank.1  
If your image is already inserted into a page or post, you may have to edit the title in the same way by clicking on the 'Edit Image' icon in the page or post content editor in 'Visual Tab' Mode.