One possible title could be 'The Broken Heart's Lament'. It directly conveys the sense of sadness associated with a broken heart, which is a common theme in sad stories.
Some good sad story titles are 'Silent Sorrow'. This title implies that there is a deep, unspoken sadness. 'Abandoned Hope' is also a sad one. It gives the feeling that someone has lost all their hopes and is left in a desolate state. 'The End of the Dream' is another sad title. Dreams often represent our desires and when they end, it's a very sad concept.
The Lost Smile. This title gives a sense of something precious being gone, like a person's ability to be happy. It could be about a character who has faced so much hardship that they've lost their most positive feature, their smile.
Some good titles for sad stories could be 'Lonely Hearts'. This title gives the impression of people who are alone and perhaps feeling sad because of it. 'Tears in the Rain' is also a great one. Rain often symbolizes sadness in literature, and the addition of tears makes it even more melancholic. Then there's 'Silent Sorrow', which implies a deep, unspoken sadness that the characters might be experiencing.
'Faded Love: The End of a Beautiful Dream'. This title gives the sense of a love that once was strong and beautiful but has now faded away, which is often a very sad scenario in love stories.
'Memories of Loss'. This title is a bit more general but it can work well for a sad story about loss. It makes the reader think about the memories associated with the loss and how they can be both beautiful and painful at the same time.