woocommerce/templates/single-product/title.php

<?php
/**
 * Single Product title
 *
 * @author 		WooThemes
 * @package 	WooCommerce/Templates
 * @version     1.6.4
 */
?>
<h1 itemprop="name" class="product_title entry-title"><?php the_title(); ?></h1>