A good SEO needs Alt attributes, Titles, Captions, and Descriptions. Not just for the SEO, but also for the accessibility.

Sometimes our clients don´t like to see the Titles or some other attributes when they are with the mouse hover an image and this one shows us the attribute.

If you want to hide them, you can go to your Divi Theme Options > Scroll down until > Personalized CSS and paste this code:

/* Hide image´s titles when hover */
img {
pointer-events: none;
}

That´s all!