Holders Donemana have made it an all NW semi-final line up after beating CIYMS by 34 runs at Belmont.
Mark Moore's powerful 95 set them on their way to a total of 230 for 6, as he and Jamie Huey (44) shared a century opening stand.
Dean Mehaffey (38) and Billy Dougherty (28) also chipped in, with David Robinson's 3 for 51 the pick of the CIYMS attack.
Robinson top scored with 60 in the reply, as he and Titterington (30) added 67 for the 7th wicket, but they could only manage 196.
Huey picked up three wickets, while Ritchie and Willie McBrine took two apiece.
Donemana now face Fox Lodge in the semi-final, while Bonds Glen and Eglinton meet in the other with the other games scheduled for July 21st.
With two NW teams in the final, it will now be held in the region on Sunday August 25th.