<?php
    remove_action('woocommerce_single_product_summary','woocommerce_template_single_title',5);
    add_action('woocommerce_single_product_summary', 'woo_change_title',5);

    function woo_change_title() {
        ?>
            <h1><span><?php the_title(); ?></span></h1>
        <?php
    }

?>