Malusi Siboto and Jonathan Vandiar will wear the colours of The Unlimited Titans in the 2016/17 season.
The pair join from the VKB Knights and Sunfoil Dolphins respectively, while Daniel Sincuba also switches from KwaZulu-Natal to the Easterns Titans franchise.
Seam bowler Siboto, 28, has grown in leaps and bounds since his Knights debut in the 2011/12 season.
Despite a lengthy injury lay-off, the right-armer was a key part of the team for the Central Franchise last season. Siboto has over 150 first-class wickets and more than 100 in the limited-over formats. He will be joined by two former Dolphins players at the Titans.
One is batsman Jonathan Vandiar, who previously played in Gauteng with the bizhub Highveld Lions. The 26-year-old spent a few seasons at Sahara Stadium Kingsmead, but failed to stake a regular place in the team.
Sincuba, also a batsman, is a franchise cricket rookie having played seven matches for the Dolphins since his debut in 2014/15.
The Titans also boast the most number of nationally contracted player with six in total. They are Test and One-Day international captain AB De Villiers, T20 skipper Faf Du Plessis, Dean Elgar, Farhaan Behardien, Morne Morkel and Quinton De Kock.
Titans squad: Qaasim Adams, Junior Dala, Henry Davids, Morne Morkel, Heinrich Klaasen, Heino Kuhn, Farhaan Behardien, Aiden Markram, Dean Elgar, Grant Mokoena, Albie Morkel, Chris Morris, Lungi Ngidi, AB de Villiers, Tabraiz Shamzi, Malusi Siboto, Daniel Sincuba, Grant Thomson, Shaun von Berg, David Weise, Quinton de Kock, Rowan Richards, Jonathan Vandiar, Faf du Plessis.