He joined Southampton as soon as hostilities were over and made a handful of appearances in friendly matches before the resumption of league football. Although Titmuss considered himself to be a left-winger, he was soon converted into an outstanding left-back. He played his first competitive match on the opening day of the 1919–20 Southern League season and quickly formed a partnership with Tom Parker, who were described as "the best pair of backs in the South".[1]
Southampton were champions of Division Three (South) in 1922 conceding only 21 goals, with Titmuss an ever-present. According to Holley & Chalk's "Alphabet of the Saints", "his speciality was the slide tackle although his perfect positional play often meant that such 'last ditch' defending was hardly ever needed."[2]