remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_title', 5 );

function woocommerce_template_single_title_custom(){
    $additional_text = ' More Info';
    the_title( '
', $additional_text.'
' );
}
add_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_title_custom', 5);