$yourquery = new WP_Query('posts_per_page=5&orderby=title');
would do that.
Edit Added Answer
<?php
$posts = new WP_Query('posts_per_page=5');
foreach($posts->posts as $post){
$sorted[$post->ID] = $post->post_title;
}
asort($sorted, SORT_STRING);
foreach($sorted as $k=>$v){
//your loop -- use ID's for each item call
the_title($k);
the_content($k);
}
?>