The 15-year-old will compete in the individual and team epee events at the European Championships in Plovdiv, which take place between February 28 and March 4.
He will then return to the Bulgarian city at the start of April for the World Championships, where he will fight in the individual cadet epee and also the mixed multi-weapon team event.
Andrews is the highest ranked under-17 epeeist in Britain and is in his second year as part of the GB cadet fencing team.
His selection for the two major championships in Plovdiv follows successful international performances in Austria, Denmark, France and Luxembourg since October.
Andrews is relishing testing himself against the best young fencers on the plant.
He said: “I am really looking forward to both competitions.
“For many countries in Europe fencing is a very high profile sport and it’s great to compete with the best of these nations.
“This is my second year on the team and I am really pleased to have reached a position to be selected for the European and World Championships this year as I have another year this age category.
“My coaches, Pete Barret and Michal Janca, have increased my training in the last few months and I have really benefitted from their international experience.”
Fellow Plymouth fencer Kerenza Bryson will join Andrews in Plovdiv for the combined European Cadet and Junior Championships. She will compete in the junior women’s epee event.