The way to unlock the Ice Titan in Destiny 2 is mainly through side missions.
In the story missions, players can obtain the first branch of each profession in the early stages. The first branch of the Ice Titans is the "Hunters". First, you need to find a foreign object in a sub-profession. This thing is not obtained from a mission, but picked up randomly; during the side missions of the plot, the enemy will have a certain probability of dropping foreign objects belonging to different professions. Each profession is different, and there will be a system prompt after picking it up; if When you reach around level 15 and you haven’t picked up any foreign objects from the branch profession, try doing more tasks in the public area; after picking up the relics, you can see a gray branch profession logo in the upper left corner of the character panel. During this time Just continue to kill enemies and complete tasks with your teammates to save energy; after you save enough energy, the system will prompt you to see that there is an extra mission in the European No Man's Land; enter the mission, follow the instructions to complete it, and then get the second one Branch careers.
The third branch is obtained according to branch tasks.