Muir, who studied Sports Performance, impressed across all five disciplines on her European debut to finish fifth overall in the women’s final.
Fellow graduates Kate French and Samantha Murray – who are preparing for the Rio 2016 Olympic Games – finished tenth and 17th respectively, meaning the British trio claimed silver in the team competition.
Lithuania’s Laura Asadauskaite successfully defended the title she had won when the University of Bath staged the European Championships in 2015.
The men’s final on Sunday saw Business Administration graduate James Myatt produce a fantastic performance in the combined run/shoot to surge from 22nd up to tenth overall.
Sam Curry, who studied Politics and International Relations, was just 18 seconds his team-mate in 19th place. Gold went to Czech athlete Jan Kuf.
Full reports from the European Championships can be found on the Pentathlon GB website.
Pictured are (from left) Samantha Murray, Joanna Muir and Kate French in training at the University of Bath Sports Training Village, home to the Pentathlon GB national centre