It was 25-year-old Evans’ 28th ranking title on the World Ladies Billiards & Snooker Association circuit.
World number three Bonney, 34, led in the first frame but awkward bridging while she was sat on the edge of the table left the pink in the jaws.
A 36 break gave Evans a 1-0 lead and she wrapped up the third with a 65.
“I don’t like to give too many chances away,” she said. “I played some good safety and that got me in. Emma missed a couple.”
Bonney admitted she had chances in the first two frames and insisted she’s not prepared to roll over for the undisputed world number one.
“I do always believe I can beat her,” she said. “As whoever watches me play in practice, and who knows me, has that belief that I can.
“I’m definitely not just satisfied with getting to the final and then losing to Reanne.”
Evans, from Dudley, West Midlands , heads to Bury St Edmunds next month seeking a seventh world title.
“Hopefully I can carry on the run,” she said.
Katie Henrick’s first appearance of the season ended in a 3-0 last-four defeat by Evans. In the second semi, Bonney accounted for world number two Maria Catalano 3-0.
Catalano, 29, from Dudley, West Midlands, contributed the highest break of the event, a 74 against 11-year-old Woking schoolgirl Jasmine Bolsover in the last-16.
Vicky Carter (Hemel Hempstead) defeated Marianne Williams (Smallfield, Surrey ) 2-0 to claim the Plate trophy.
Hannah Jones, from Derby , won the junior title, beating Bolsover 2-0 in the final. The 14-year-old climbed one place to sixth after reaching the quarter-finals of the main event.
The World Championships will be the sixth and final ranking event on this season’s WLBSA tour.
PRELIM: Jenny Poulter beat Victoria Gibbs 3-0.
LAST-16: Reanne Evans beat Poulter 3-0, Tina Owen-Sevilton beat Karen Harrison 3-0, Martina Lumsden beat Gaye Jones 3-1, Katie Henrick (35, 30) beat Vicky Carter (33) 3-1,
Emma Bonney beat Natascha Niermann 3-0, Eva Palmius beat Naomi Clare 3-0, Hannah Jones beat Marianne Williams 3-1, Maria Catalano (74) beat Jasmine Bolsover 3-0.
QUARTER-FINALS: Evans (55, 34, 34) beat Owen-Sevilton 3-0, Henrick beat Lumsden 3-0, Bonney beat Palmius 3-2, Catalano (58) beat H Jones 3-0.
SEMI-FINALS (£40): Evans (39, 34) beat Henrick 3-0, Bonney beat Catalano 3-0.
FINAL (£150/£90): Evans (65, 36) beat Bonney 3-0. Frame scores, Evans first: 77-44, 68-10, 76-38.
PRELIM: Natascha Niermann (42) beat Jasmine Bolsover 2-0.
QUARTER-FINALS: Naomi Clare beat Karen Harrison 2-0, Marianne Williams beat Victoria Gibbs 2-0, Vicky Carter beat Gaye Jones 2-0, Jenny Poulter beat Natascha Niermann 2-1.
SEMI-FINALS: Williams beat Clare 2-0, Carter beat Poulter 2-1.
FINAL (£20/£10): Carter beat Williams 2-0.
ROUND-ROBIN: Hannah Jones (34) beat Jasmine Bolsover 2-0, Bolsover beat Naomi Clare 2-0, Jones beat Clare 2-0.
FINAL: Jones beat Bolsover 2-0.
CONNIE GOUGH NATIONAL CHAMPIONSHIP ENTRIES
Reanne Evans (Dudley, West Mids )
Maria Catalano (Dudley, West Mids )
Emma Bonney ( Portsmouth )
Katie Henrick ( Bickley , Kent )
Eva Palmius (Isleham, Cambs)
Jenny Poulter ( Maidstone )
Hannah Jones ( Derby )
Marianne Williams (Smallfield, Surrey )
Martina Lumsden ( Eastbourne )
Gaye Jones (Melksham, Wilts)
Vicky Carter ( Hemel Hempstead )
Tina Owen-Sevilton ( Taunton )
Natascha Niermann ( Cambridge )
Naomi Clare (Ripley, Derbys )
Jasmine Bolsover ( Woking )
Victoria Gibbs (Trowbridge)
Karen Harrison ( Fareham )
2011 World Championship, sponsored by Greene King
Friday April 8 to Wednesday, April 13
Pot Black Sports Bar
Bury St Edmunds
Bury St Edmunds
Tel: 01284 704231
Pictures by Mark Jones:
Fareham Snooker Club owner Serena Sinanan (left) presents Reanne Evans with the Connie Gough National Championship trophy.
Hannah Jones (left), the Connie Gough junior champion, and Fareham Snooker Club owner Serena Sinanan.
Picture by Monique Limbos:
Vicky Carter, the Connie Gough plate winner.
More details and action shots of most of the ladies available from:
Tim Dunkley (WLBSA press office)
88 Lionheart Way
Tel home: 02380 562647
Mobile: 07986 376114