add_filter('the_title', function ($post_title, $post_id) {
    $post = get_post($post_id);

    if ('product' == $post->post_type && !is_single($post_id) && !is_admin()) {
        $length = 22;
        $post_title = (mb_strlen($post_title) > $length) ? (mb_substr($post_title, 0, $length) . "...") : $post_title;
    }

    return $post_title;
}, 10, 2);