WooCommerce - Shorten product titles

<?php
  // shorten product title
  // code goes in functions.php for your child theme
  add_filter('the_title', 'modify_title', 10);
  function modify_title( $title ) {
    if ( is_woocommerce() || is_product_category() ) {
      if ( strlen( $title ) > 10 ) {
        $title = substr($title, 0, 10).'...';
      }
    }
    return $title;
  }