This poem is about the sinking of the ship, Titanic, in 1912. The title, "The Convergence of the Twain," I think it means a marriage between the ship and the iceberg. Besides, the speaker seems to tell us a story about Titanic step by step, but he speaks in terms of flashback. At the beginning, he says Titanic couched in a solitude of the sea. It was the result. In the tenth stanza, Titanic crashed into the iceberg. It was the beginning of the disaster.
In the second stanza, the speaker says the chambers are the pyres. It seems that at first, the chambers were ready to be burn. In the fourth stanza, because most passengers on Titanic were rich, they wore valuable jewels; but when the ship sank, these jewels were worth nothing and their sparkles disappeared. In the fifth stanza, even the fishes query: "What dose this vaingloriousness down here?" I think the speaker is critical of the pride ship and expresses his idea by fishes' tone on purpose. Besides, "The intimate welding of their later history," the words the speaker uses make me feel that in his opinion, the sinking of Titanic happened naturally and maybe Titanic deserve it. Because the reason for the disaster mainly contributed to people's arrogance, the poet criticizes that.
The speaker's view of death is different from that in the poem, "Do not go gentle to that good night." The speaker in the former poem thinks death is natural and the luxury and pride ship deserved it. However, the speaker in the latter poem wants his father to fight against death and don't give up.
I think this poem is open form, because it doesn't follow established patterns, but the poet creates his own patterns. We can find that each stanza has its own rhyme, and it is end rhyme, which means rhyming sounds occur at the end of lines. In the forth stanza, the words "bleared" "black" and "blind" are the use of alliteration. In the last stanza, the words "consummation" and "comes" are the same use. By the way, if we pay more attention to the pattern of each stanza, we can find it is interesting that it looks like a ship. I think it maybe the poet that arranges the length of lines on purpose in order to respond to the poem, which is about the ship, Titanic. In a word, although this is an open form, it still has its own form, and the pattern of each stanza fits the idea.