Canada released its official investigation into the Titan submersible disaster on June 17, 2026. The Titan imploded on June 18, 2023, while diving toward the wreck of the RMS Titanic in the Atlantic Ocean. All five people on board died.

Nearly three years passed between the disaster and this report. But this is not the only investigation happening. The U.S. National Transportation Safety Board started its own inquiry (NTSB case DCA23FM036), and the U.S. Coast Guard opened a formal investigation. Three different organizations are examining the disaster because the submersible crossed international waters and because the accident drew enormous public attention.

What Was Wrong With the Titan's Hull

The Titan was built with two different materials: titanium metal at each end, with a carbon fibre tube in the middle that formed the main pressure hull — the part that held the people and protected them from crushing ocean pressure.

Engineers found problems in that carbon fibre tube. At hearings in September 2024, engineer Don Kramer reported that the hull had wrinkles, tiny holes, and gaps that came from how it was built — not from normal use. Think of it like a crack in a foundation that exists when a house is first built, not one that develops over time. Carbon fibre gets weaker when it is squeezed and released over and over. Each time the Titan dove and rose, it put pressure on those existing weak spots. Each cycle made the damage worse.

The Titan made several dives before the final one. We cannot know exactly how damaged the hull was on that last dive — the submersible was destroyed — but scientists understand how carbon fibre breaks down under repeated pressure.

Why Rules Matter Going Forward

OceanGate ran the Titan as an experimental vessel, which meant it did not have to follow the same safety rules as commercial submersibles. Before the disaster, some people — including former OceanGate contractors — had warned that the hull needed official certification. The Canadian investigation and the U.S. Coast Guard's work will likely shape whether new rules are created.

The bigger question is whether all three investigations reach the same conclusions. If they do, they can make strong recommendations to governments and maritime organizations. The U.S. and Canada have good track records of turning safety investigations into new rules. The U.S. Coast Guard's conclusions will matter to Congress and the International Maritime Organization, the body that sets international maritime standards. Any permanent change to how submersibles are built and approved would need to happen at that global level.

The Titan disaster left no survivors and no intact hull to study. What investigators have are pieces from the ocean floor, the evidence they collected during the search, and the technical analysis they completed over three years. The Canadian report is an important piece of that puzzle — but the work of figuring out how to prevent this from happening again is still underway.