How to get title tag of an external page with http api?

What is the best method to retrieve the title tag of an external page using the http api?

The snippet below will get the body but I can’t find the right documentation about how to just get the tag. :/

$url="http://wordpres.org";
$response = wp_remote_get( $url );
if( is_wp_error( $response ) ) {
   echo 'Something went wrong!';
} else {
print wp_remote_retrieve_body( $response );
}

Edit: This code snippet gets both the screenshot
and title of an external page (Thanks again @Bainternet). With a
little editing this could be an easy
way to display the link post format.

<?php 
$content = get_the_content();
$url = strip_tags($content); //assumes only a url is in the_content
$width="150";
$cleanurl = urlencode(clean_url($url));
$fullurl="http://s.wordpress.com/mshots/v1/" . $cleanurl . '?w=' . $width;

// return title tag of an external page
// http://wordpress.stackexchange.com/questions/19424/how-to-get-title-tag-of-an-external-page-with-http-api
function get_page_title($url){
    if( !class_exists( 'WP_Http' ) )
        include_once( ABSPATH . WPINC. '/class-http.php' );
    $request = new WP_Http;
    $result = $request->request( $url );
    if( is_wp_error( $result ) )
        return false;

    if( preg_match("#<title>(.+)<\/title>#iU", $result['body'], $t))  {
        return trim($t[1]);
    } else { 
return false; }
    }
$title = get_page_title($url);      

echo '<div class="grid_4 alpha"><a href="' . $url . '"><img src="' . $fullurl . '" width="' . $width .'px" /></a></div>'; 
echo '<div class="grid_10 omega"><h3>'; if ($title !== false){ echo $title;} echo '</h3><p>' . $content . '</p></div>';
echo '<div class="clear"></div>';
?>

here is a function i have for that:

function get_page_title($url){
        if( !class_exists( 'WP_Http' ) )
            include_once( ABSPATH . WPINC. '/class-http.php' );
        $request = new WP_Http;
        $result = $request->request( $url );
        if( is_wp_error( $result ) )
            return false;

        if( preg_match("#<title>(.+)<\/title>#iU", $result['body'], $t))  {
            return trim($t[1]);
        } else {
            return false;
        }
    }

Usage:

$title = get_page_title('http://www.google.com');
if ($title !== false){ echo $title;}