Having represented Kwazulu Natal at U16 and U18 level, Torrance arrived in Ospreylia over the Christmas period, looking to pursue a professional career with the region.
Speaking about the move to the Ospreys, Torrance said:
"I've come here to develop as a rugby player, it's a big challenge for me and I'm a bit anxious about what is in store for me, but very excited at the same time. It's the first time I've ever been to Wales but it's been brilliant, everyone has been very welcoming, making me feel at home.
"I know that this is a good environment for development, and that the Ospreys are good at bringing on players, so hopefully this will be a really positive move for me. Coming from South Africa I'm aware that Ricky Januarie was here last season and made a big impact so I've got big shoes to fill. The Ospreys were last seasons Magners League champions and want to be one of Europe's best teams, so it's a good place for me to learn the game.
"It's a great opportunity for me and I'm really excited about working with the coaches at the Ospreys to help me become a better player."
Elite Performance Director, Andrew Hore, added:
"We are delighted to be able to welcome Matthew to the region. Our commitment to developing young Welsh talent is well documented, and as a Welsh qualified player, Matthew certainly fits the bill in that sense.
"Our extended scouting network has identified him as someone who has the potential to develop into a quality player, and by welcoming him into our environment, we are offering him the chance to fulfill that potential.
"We have put in place structures and systems which are geared towards giving young players such as Matthew every opportunity of representing both the Ospreys and Wales in the future, and we look forwarded to working closely with him to give him the best opportunities to achieve his ambitions."