Material Science: Why did Titanic Sunk?

For many years researchers had been looking for an answer why did titanic sunk. For an engineers perspective, this can be because of the following reasons:

1. Climate caused more icebergs
Weather conditions in the North Atlantic were particularly conducive for corralling icebergs at the intersection of the Labrador Current and the Gulf Stream, due to warmer-than-usual waters in the Gulf Stream, Richard Norris of the Scripps Institution of Oceanography told Physics World. "Oceano graphically, the upshot of that was that icebergs, sea ice and growlers were concentrated in the very position where the collision happened," Norris said.

2. Tides sent icebergs southward
Last month, astronomers at Texas State University at San Marcos noted that the sun, the moon and Earth were aligned in such a way that could have led to unusually high tides in January 1912. They speculated that the tides could have dislodged icebergs that were stuck in the Labrador Sea, sending more of them toward the waters traversed by the Titanic a couple of months later.

3. The ship was going too fast
Many Titanicologists have said that the ship's captain, Edward J. Smith, was aiming to better the crossing time of the Olympic, the Titanic's older sibling in the White Star fleet. For some, the fact that the Titanic was sailing full speed ahead despite concerns about icebergs was Smith's biggest misstep. "Simply put, Titanic was traveling way too fast in an area known to contain ice; that's the bottom line," says Mark Nichol, webmaster for the Titanic and Other White Star Ships website.

4. Iceberg warnings went unheeded
The Titanic received multiple warnings about icefields in the North Atlantic over the wireless, but Corfield notes that the last and most specific warning was not passed along by senior radio operator Jack Phillips to Captain Smith, apparently because it didn't carry the prefix "MSG" (Masters' Service Gram). That would have required a personal acknowledgment from the captain. "Phillips interpreted it as non-urgent and returned to sending passenger messages to the receiver on shore at Cape Race,Newfoundland, before it went out of range," Corfield writes.

5. The binoculars were locked up
Corfield also says binoculars that could have been used by lookouts on the night of the collision were locked up aboard the ship -- and the key was held by David Blair, an officer who was bumped from the crew before the ship's departure from Southampton. Some historians have speculated that the fatal iceberg might have been spotted earlier if the binoculars were in use, but others say it wouldn't have made a difference.

6. The steersman took a wrong turn
Did the Titanic's steersman turn the ship toward the iceberg, dooming the ship? That's the claim made in 2010 by Louise Patten, who said the story was passed down from her grandfather, the most senior ship officer to survive the disaster. After the iceberg was spotted, the command was issued to turn "hard a starboard," but as the command was passed down the line, it was misinterpreted as meaning "make the ship turn right" rather than "push the tiller right to make the ship head left," Patten said. She said the error was quickly discovered, but not quickly enough to avert the collision. She also speculated that if the ship had stopped where it was hit, seawater would not have pushed into one interior compartment after another as it did, and the ship might not have sunk as quickly.

7. Reverse thrust reduced the ship's maneuverability
Just before impact, first officer William McMaster Murdoch is said to have telegraphed the engine room to put the ship's engines into reverse. That would cause the left and right propeller to turn backward, but because of the configuration of the stern, the central propeller could only be halted, not reversed. Corfield said "the fact that the steering propeller was not rotating severely diminished the turning ability of the ship. It is one of the many bitter ironies of the Titanic tragedy that the ship might well have avoided the iceberg if Murdoch had not told the engine room to reduce and then reverse thrust."

8. The iron rivets were too weak
Metallurgists Tim Foecke and Jennifer Hooper McCarty looked into the materials used for the building of the Titanic at its Belfast shipyard and found that the steel plates toward the bow and the stern were held together with low-grade iron rivets. Those rivets may have been used because higher-grade rivets were in short supply, or because the better rivets couldn't be inserted in those areas using the shipyard's crane-mounted hydraulic equipment. The metallurgists said those low-grade rivets would have ripped apart more easily during the collision, causing the ship to sink more quickly that it would have if stronger rivets had been used. Other researchers have contested that claim, however.

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