Rose spitting in Cal's face when he tries to force her into a lifeboat after she realizes he's framed Jack for theft and left him to die below deck. Cal's so caught off guard by this that Rose manages to slip free and run off to save Jack. The best part? Jack was the one who taught her to spit like that in the first place!
Also an excellent example of Throw It In!; the original script had Rose stick him with a pin, until Cameron realized that making the spitting lesson into a Chekhov's Gun would work perfectly.
"I'd rather be his whore than your wife!"
Immediately prior to that scene, when Cal demonstrates absolutely no regard for those doomed to die on the ship, and callously remarks that Jack's drawing "will be worth a lot more by morning", Rose hits him back with this:
The scene right before the ending, where Rose dies an old woman warm in her bed, and we see the photos on her mantel that tell us what she did after the sinking of the Titanic. Okay, so, she cut herself off from her family and had only her talents and determination to see her through after the sinking, and arrives in New York with absolutely nothing except the Heart of the Ocean she never sold and yet she still managed to fulfill her promise to Jack to live her life to the fullest, traveling and falling in love and raising children and everything. All during a time when it wasn't easy to be a woman, and it is never easy for someone so sheltered to strike out like that on her own. But she did it because Jack helped her realize that she had agency and free will in her own life, and she used that free will to steer her fate and fulfill her promise to Jack. Awesome. Rest in peace, Rose. You earned it.
The entire second half of the movie is one for the filmmakers. Specifically, the ship sinking in almost real time.
May also count as a Tearjerker, but the priest towards the end, who continues saying Hail Marys with the passengers even as the ship is going vertical, clutching at the hands of a few passengers as he holds onto a piece of the deck for dear life, and even so, he keeps talking. It somehow seems both sad and inspirational.
Priest: (as the deck nears vertical) Holy Mary, Mother of God, pray for us sinners, now and at the hour of our death.
Doubles as a Tear Jerker; Thomas Andrews (the designer of the ship) doing what he can to assist people in the evacuation, namely telling passengers and crew to put on their life jackets, as well as demanding that the boats be filled to capacity. (For clarification; the boats could be filled with 65 people, and some were being launched with as few as 12.) He also gives his own life jacket to Rose and tells her to save herself and Jack, resigning to go down with the ship.
The Unsinkable Molly Brown ordering the women in the boat to grab an oar, and the captain of the lifeboat refuses because they'd swamp the boat, and her reply, "I don't understand either one of you! What's the matter with you?! IT'S YOUR MEN OUT THERE!"
Sadly they missed (or dropped for the sake of time) an even better Real Life moment of awesome: The morning after, the Carpathia was spotted by the boat, and the guy at the tiller wasn't going to steer the boat over to it, saying it was to collect the bodies. What does Mrs. Brown do? Threaten to toss him overboard. The story may be apocryphal, but it would be in keeping with Molly's personality.
Another awesome thing omitted: by the time the survivors reached New York, Maggie Brown helped to form a committee to aid the financially poor survivors, was voted the head of it, and raised $10,000 for the cause. Keep in mind she did all this in a matter of days. Adjusting for inflation, that's around $240,000.
Rose punching the guy that was trying to take her away from Jack, as well as how she searches for Jack instead of getting into a lifeboat in the rapidly flooding ship.
Rose telling her overbearing and selfish mother what we all were thinking when she makes some haughty remark about whether the lifeboats will be seated according to class... "SHUT UP!" She then follows up by telling Ruth that this isn't a joke, and that people are going to die tonight.
In spite of what he does immediately after, Officer Murdoch throwing Cal's bribe back in his face when he pushes forward to demand a place in the last lifeboat is still a well-deserved slap to someone arrogant enough to believe he could pay his way to safety.
The musicians playing as the ship goes down, sacrificing their lives to keep the passengers calm. Made even more awesome by the fact that it actually happened in the real sinking. And those goes double for the engineers, who chose to stay in the bowels of the ship, frantically trying to keep the power on.
Made even more awesome by the fact that it actually happened, as shown in the records of the inquest after the sinking. Lowe didn't know who Ismay was at the time, and saw only an arrogant and hysterical passenger.
At one point, Second Officer Lightoller is trying to load a boat and keep a crowd of desperate passengers at bay; he brandishes his gun and tells them to keep back, "or I'll shoot you all like dogs!" Not the most heroic action, but when he turns around and orders Lowe to man the boat he's quickly loading the gun, meaning he pulled an incredibly effective bluff with an empty weapon. You've got to admire his sheer nerve. Johnny Philips, the actor playing Lightoller, ad-libbed this part, and when Cameron was impressed and told him to do it again he was hardly aware he'd done it, he'd been so caught up in the the moment.
"Titanic was called the Ship of Dreams, and it was. It really was." Cue a slow fade from the wreck into the good ship in all her glory as she prepared to set off on her maiden voyage. From that point on, pretty much every shot of the ship is a moment of awesome in its own right. Not just for the incredible feat of engineering that the Titanic was, but for the incredible job James Cameron did to recreate her. Because CGI was still in its infancy, he rebuilt the entire ship.To scale. (With the help of Harland and Wolff, the original designers of Titanic, as well!) This extended to the interior sets as well, which were made to be as accurate as possible, and were really destroyed during the filming of the sinking. This feat was also accomplished through the use of smaller scale models, and minimal CGI. This was probably one of the biggest reasons the film became a world-wide phenomenon: James Cameron didn't just make an amazing movie set on Titanic, he brought the ship back to life.
The fact that Rose made it through life, on her own, in the 1920s, The Depression, 1930s, WORLD WAR II and God knows what else; eighty four years and no matter the hardships, she never sold the diamond that Cal gave her. Not once. She managed eighty four years on her own (and with her husband)... without any help from the asshole she loathed.
Jack, Fabrizio and Tommy rip a bench from the floor and, with Rose ushering people out of their way, use it to batter down a locked gate in steerage. Tommy knocking down a crew member with one punch immediately after that.
Titanic was the first film to reach the billion dollar mark at the worldwide box office. Then the 3D re-release pushed it over the $2 billion mark, the second time a film reached it after Avatar. Even after there being three more movies that have grossed $2 billion after it, only Avengers: Endgame was able to bypass Titanic's gross with both Star Wars: The Force Awakens and Avengers: Infinity War falling short by about $100 million.
The film was nominated for fourteenAcademy Award categories, and won eleven Oscars, including Best Picture, tying Ben-Hur's record from way back in 1959.
The 3D re-release in 2012. It's remarkable enough that the release came in time for the 100th anniversary of the disaster. But the awesome moment comes from the time and effort that was spent on the release. What could've easily been a quick and dirty 3D conversion was instead a 60-week, $18 million effort. The aspect ratio was increased, the soundtrack was remastered, and the entire film was converted to 4K resolution. The end result was perhaps the ultimate depiction of the disaster that has ever been made, or might ever be made. You're no longer just watching a movie about the sinking of the Titanic. You. Are. There.