Hello,
When you upload images in WordPress it has titles and this title is rendered when you show images, this is normal in WordPress, theme does not have option to hide that title appearance. You can either search for third-party plugins to hide image titles or try to remove it by adding the below code before
<script>jQuery(document).ready(function($) {
$(‘img[title]’).each(function() { $(this).removeAttr(‘title’); });
});</script>
Or maybe some solution from here will help you https://stackoverflow.com/questions/11257668/is-it-possible-to-hide-title-when-hovering-image
Anyway, it’s not related to theme.
Regards