Here is how you do it,
First remove woocommerce single title action, and create your own function to handle the title, later add back the action using your newly created function.
<?php
remove_action('woocommerce_single_product_summary','woocommerce_template_single_title',5);
add_action('woocommerce_single_product_summary', 'woocommerce_my_single_title',5);
if ( ! function_exists( 'woocommerce_my_single_title' ) ) {
function woocommerce_my_single_title() {
?>
<h1 itemprop="name" class="product_title entry-title"><span><?php the_title(); ?></span></h1>
<?php
}
}
?>