The British team have enjoyed a stellar season, maintaining the form they showed at the Paris Olympics by equalling their record medal haul at a world championships with 13 medals.
They finished second in the overall medal table, while the women’s team weighed in with all four of GB’s gold medals.
“It has been hard but the medals are worth winning,” said Marchant. “We really used each other. Especially for today, me and Emma really bounced off each other.
“The competition is high and the standard is really good in the women’s sprint programme now. Every day we are trying to beat the best in the world because we have the number one in the world [Finucane] in our team.
“It’s a great environment to be a part of, but I am not saying it is easy.”
The Netherlands’ Harrie Lavreysen claimed his sixth consecutive men’s world sprint title after beating team-mate Jeffrey Hoogland in the final.
It was the 16th world gold medal of the 27-year-old sprinter’s career, with Japan’s Kaiya Ota claiming bronze.
“I like the rainbow jersey so I like to keep it,” Lavreysen told the BBC.
“My team-mate Jeffrey rode a lot of really good riders out the tournament, I think that was to my advantage, so I felt pretty confident going into the finals today.”
Hosts Denmark had two winners on the final day, with Julie Leth claiming gold in the women’s points race, before Tobias Aagaard Hansen finished at the head of the field in the men’s elimination race, which was punctuated by a series of heavy crashes.
Germany claimed victory in the final event of the meeting, winning gold in the men’s madison.