You can probably just use javascript to remove titles. (Add to header.php below “<body <?php body_class(); ?>>” to remove all titles from website). You could put a conditional if for titles you don’t want removed.
A PHP solution would be better obviously.
To remove titles:
<script type="text/javascript">
window.onload = function(){
var titled = document.querySelectorAll('[title]');
var numTitled = titled.length;
var i = 0;
for (i=0; i<numTitled; i++){
titled[i].removeAttribute('title');
}
};
</script>
To remove alt:
<script type="text/javascript">
window.onload = function(){
var titled = document.querySelectorAll('[alt]');
var numTitled = titled.length;
var i = 0;
for (i=0; i<numTitled; i++){
titled[i].removeAttribute('alt');
}
};
</script>