FUKUOKA, Japan (AP) — Ariarne Titmus has broken the world record in the women 400-meter freestyle in a star-studded race that featured three women who have held the mark. Titmus swam the distance in 3 minutes, 55.38 seconds to top the record set four months ago by Summer McIntosh of Canada of 3:56.08. The record fell on Sunday on the first day of eight in the pool at the World Aquatics Championships in Fukuoka in southwestern Japan.