Evans took another step towards a possible world title shot in a scrappy fight that swung in favour of the champion in the later rounds.
Ormond was down twice at the end of the final round as two left hands to the body secured a 10-7 round for Evans.
The judges scored the contest 97-91, 99-89, 96-93 in favour of the Welshman.
Evans stated before the fight that he wants a shot at WBO lightweight champion Terry Flanagan and victory over Ormond will improve his WBO ranking of ninth.

The firm said it had signed a Letter of Intent to enter into exclusive negotiations with Liberty House Group.
More than 1,700 people are employed in the division, which has factories in Rotherham and Stocksbridge.
Steel union Community said it welcomed news of negotiations following "months of unnecessary stress and concern".
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The union's general secretary Roy Rickhuss said: "This is a positive step for the UK steel industry; however there remain huge challenges which government must address."
The union said it would be seeking urgent talks with Liberty House Group and would be asking what their plans were for investment, protecting jobs and providing decent pensions for members in retirement.
Tata Steel's UK boss Bimlendra Jha said the announcement was "an important step forward".
"We now look forward to working with Liberty on the due diligence and other work streams so that the sale can be successfully concluded," he said.
The Speciality Steels unit makes high-end components for the automotive, aerospace and oil industries.
In April, Tata sold its long-products division, based in Scunthorpe, to Greybull Capital, a UK-based investment firm.

Lilliard Gin is based at the Born in the Borders visitor centre in Jedburgh.
It comes ahead of a number proposals, which are at various stages of the planning process, to open the region's first whisky distillery since 1837.
Lead distiller Kate Macinnes said the potential to make the Scottish Borders a "region of distilling excellence" was "really exciting".
"Our gin production is on a completely different scale to the other distilleries in development," she said.
"Our still is one of the smallest production stills in the UK, and our entire operation fits into a cowshed, but if people like our gin, that's all that matters.
"We have a rich abundance of wild food on our doorstep in the Teviot valley, and Lilliard Gin aims to capture that and convey a true sense of the local flavour palette and our Borders 'terroir'."
John Henderson, of Born in the Borders, said the gin distillery was a natural companion to the Scottish Borders Brewery on the site.
"To be able to play host to the first new distillery in the Borders in nearly 200 years is incredible," he said.
"And the fact that Lilliard Gin are looking to use Borders botanicals means they are completely in tune with our own ethos of local sourcing.
"We just can't wait for them to get started, and to taste their gin."
The gin takes its name from a legendary Borders figure.
"Lilliard was the heroine of the Battle of Ancrum Moor in 1545, fought just north of the distillery," explained Ms Macinnes.
"Lilliard reputedly fought to avenge the death of her lover at the hands of the English. The battle site is also known as Lilliard's Edge.
"We wanted a name that reflected our landscape, and our strong female production team, and Lilliard seemed like a natural choice."
Welshman Craig Evans secured a unanimous points victory over Irishman Stephen Ormond to retain his WBO European lightweight title.
[NEXT_CONCEPT]
Tata Steel has announced its preferred bidder for the £100m sale of its Speciality Steels division based in South Yorkshire.
[NEXT_CONCEPT]
A new gin distillery in the Borders - built in a converted cowshed - is to start production early in the new year.