How to hide image alt text/caption in Visual Composer?

i had also the same issue when using the AVADA theme. It appends the title attribute on the image which is showing the text/caption when its being on hover.

<script type="text/javascript">
/* The first line waits until the page has finished to load and is ready to manipulate */
$(document).ready(function(){
    /* remove the 'title' attribute of all <img /> tags */
    $("img").removeAttr("title");
});
</script>