Final Titan Report Reveals What Caused Deadly Submersible Implosion

The catastrophic implosion of the Titan submersible that killed all five people on board during a voyage to the Titanic wreckage in 2023 was caused by fundamental design flaws, a defective carbon-fiber hull, and a lack of regulatory oversight, according to a final investigative report released Wednesday by the Transportation Safety Board of Canada.

The 136-page report delivers a damning assessment of OceanGate, the company behind the doomed expedition, concluding that the vessel’s construction and testing failed to follow accepted engineering standards.

“The investigation determined that the as-built properties of the Titan’s carbon fibre cylinder were never validated to ensure they met the theoretical values used in the design process and that the construction and testing of the Titan did not follow standard engineering practices,” investigators wrote.

According to the report, OceanGate never verified whether the vessel’s carbon-fiber pressure hull could withstand repeated dives to depths of approximately 12,500 feet, where the wreck of the Titanic rests. Investigators found that while the company tested the vessel to extreme depths, it failed to adequately assess how repeated exposure to immense underwater pressure would affect the hull over time.

“As a result, OceanGate did not know for how long the Titan’s pressure hull would remain structurally intact when used repeatedly for dives to the depth of the Titanic,” the report states. Investigators also examined unused sections of the same material used to construct Titan and discovered structural defects that compromised the vessel’s integrity. 

Beyond the engineering failures, Canadian investigators said broader regulatory shortcomings allowed the submersible to continue operating despite significant safety concerns. “When it came to the Titan, critical information existed across multiple federal government organizations, but no one was responsible for connecting the dots,” Transportation Safety Board Chair Yoan Marier said. “Without a complete picture of the operation, the Titan continued to operate in Canada without regulatory oversight.”

The agency issued six recommendations aimed at strengthening oversight of submersible operations and addressing safety management failures identified during the investigation. The findings largely mirror conclusions reached by the U.S. National Transportation Safety Board last year, which determined that Titan’s carbon-fiber pressure vessel contained multiple structural anomalies and failed to meet necessary durability requirements.

The Titan imploded on June 18, 2023, during its 88th dive. Contact with the vessel was lost roughly two hours after it began descending toward the Titanic wreck site approximately 435 miles south of Newfoundland. After an international search effort failed to locate the vessel intact, debris recovered from the ocean floor confirmed a catastrophic implosion.

All five people aboard were killed, including OceanGate co-founder and CEO Stockton Rush, Titanic expert Paul-Henri Nargeolet, British businessman Hamish Harding, Pakistani businessman Shahzada Dawood, and Dawood’s 19-year-old son, Suleman.

The report comes months after the U.S. Coast Guard’s Marine Board of Investigation concluded that, had Rush not been killed, investigators would have recommended criminal manslaughter charges be considered by the Department of Justice.

OceanGate ceased operations shortly after the disaster. In a statement following the report’s release, a company spokesperson said OceanGate had fully cooperated with investigators and again offered condolences to the families of those killed. “We appreciate the professionalism shown by the TSB and the thoroughness of its investigation and final report,” the company said.