Titanium cast product for hot rolling unlikely to exhibit surface defects and method of manufacturing the same

A titanium cast product made of commercially pure titanium,

• the titanium cast product comprising:
• a layer in a range of more than or equal to 1 mm in depth on a surface serving as a rolling surface, the layer containing one or more elements out of any one of or both of at least one α stabilizer element and at least one neutral element,
• wherein a total concentration of at least one α stabilizer element and at least one neutral element in the range of more than or equal to 1 mm in depth is higher than a total concentration of at least one α stabilizer element and at least one neutral element in a base metal by, in mass %, more than or equal to 0.1% and less than 2.0%.

A method of manufacturing a titanium cast product, the method comprising:

• melting a surface serving as a rolling surface of the titanium cast product together with a material containing one or more elements out of any one of or both of at least one α stabilizer element and at least one neutral element, and then solidifying the surface,
• wherein a total concentration of at least one α stabilizer element and at least one neutral element in the range of more than or equal to 1 mm in depth is made higher than a total concentration of at least one α stabilizer element and at least one neutral element in a base metal by, in mass %, more than or equal to 0.1% and less than 2.0%.