This essay declares that the theme of trust is the underpinning them in the film is the theme of sacrifice presented as an evolving phenomenon that coils itself around romance. Cameron uses romance to bring the theme of sacrifice and he illustrates this by the relationship between Jack and Rose. These two very young people each other and starting having something common that developed into friendship. This friendship grows into trust. Trust is the lifeline to any romantic relationship, and this trust does not have to be based on anything, it can be just about people who trust each other, not because they know each other too well, but because they are yearning for love and companionship.
This paper makes a conclusion that the best way to test trust is sacrifice; if you are trustworthy, you would do anything for me. This becomes more evident at the end of the film. Rose sacrifices her freedom and even endangers her life by going to the bottom of the ship where jack is shackled (which is dangerous considering that the ship was sinking and the last place anyone would like to be is at the bottom deck). The theme of sacrifice is further depicted when Jack chooses to sacrifice his life so as Rose would carry one. At this point, their love and romance is sealed, there is no doubt beyond this that they are on love, to the point of willing to die for each other.