Truncating imported RSS Feeds.

Hey guys, Im pulling an RSS feed from my forum to display on my homepage. It displays the titles correctly, but I want to truncate the number of characters per post so it doenst take up a long section if the title is long. How do I do that? here is the code Im using

<?php // Get RSS Feed(s)
include_once(ABSPATH . WPINC . '/feed.php');

$rss = fetch_feed('https://examplesite.com/rss');
if (!is_wp_error( $rss ) ) :

    $maxitems = $rss->get_item_quantity(5); 

    $rss_items = $rss->get_items(0, $maxitems);
endif;
?>

<ul>
    <?php if ($maxitems == 0) echo '<li>No items.</li>';
    else

    foreach ( $rss_items as $item ) : ?>
    <li>
        <a href='<?php echo $item->get_permalink(); ?>'
        title='<?php echo 'Posted '.$item->get_date('j F Y | g:i a'); ?>'>
        <?php echo $item->get_title(); ?></a>
    </li>
    <?php endforeach; ?>
</ul>