An emphatic 87-run victory for the Cornwall Cricket Board denied St Joseph's the inaugural Belfast Festival title, as the heavy defeat saw their NRR slip below hosts the NCU.
It was a clinical and almost complete all-round display from the young Cornwall side, who after the early loss of Ben French (4) set about taking the game away from St Joseph's.
Alex Barrett impressed as he attacked from the off, punishing anything remotely loose. He struck 9 boundaries in a run-a-ball 57, adding 84 in 88 balls for the second wicket with Alex Lean.
Initially content to hand the strike to Barrett, lean came out of his shell and took control of the innings on his way to a brilliant 78.
He scored all-round the wicket, but was particularly string on the off-side, unleashing a flurry of text-book cover drives and square cuts.
Harry Matthews (31), Adam Thomas (30), and Jacob Inch (20*) all chipped in as Cornwall posted 260 for 6 - the highest total of the week.
St Joseph's bowling unit didn't fire, and they dropped a number of crucial catches in a somewhat lacklustre display in the field.
Jack Oakes was the most successful of the bowlers, taking 2 for 45.
The St Joseph's reply got off to a poor start as they lost early wickets denying them any momentum.
Cornwall took control of the chase and didn't relinquish their grip on the proceedings.
Keelan Waldock top scored with 56 (6 fours, 1 six), but he received little meaningful support as St Joseph's made 173 - losing by 87 runs.
Freddie Stevenson took 3 for 36, while there was a brace apiece for Freddie Ward (2-18), Lewis Dee (2-29) and Conor Cooke (2-36).