Martins sealed his title by winning an event at Innsbruck, nosing ahead of Sungbin Yun of South Korea in second place and Germany's Axel Jungk in third.
His brother Tomass finished in fifth place in the race and secured fourth place in the European Championship rankings in which Axel Jungk was second and Russia's Aleksander Tretiakoff in third.
The Latvian skeleton recorded the podium moment on their Instagram account and you can watch his all-important second run above.
A post shared by Skeleton Team Latvia (@skeleton_lv) on Jan 18, 2019 at 3:21am PST
You can read the full results and watch more video clips at the official website of the International Bobsleigh and Skeleton Federation.