There are 117. Here's how I found them, for future reference:
SELECT a.`ttl_title_id`, b.`ttl_title_id`, a.`ttl_title_code` FROM `titles` a, `titles` b WHERE a.`ttl_title_code` = b.`ttl_title_code` AND a.`ttl_title_id` <> b.`ttl_title_id` AND a.`ttl_title_id` < b.`ttl_title_id` ORDER BY a.`ttl_title_id` LIMIT 0, 1000
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