Powder material, method of manufacturing threedimensional object, and method of manufacturing joined object

A powder material, comprising:

• a first powder composed of a first alloy;
• and
• a second powder composed of a pure metal or a second alloy having a composition different from a composition of the first alloy,
• wherein the first alloy is a titanium alloy which contains at least boron (B), or an aluminum alloy which contains at least one of chromium (Cr), zirconium (Zr), scandium (Sc), or manganese (Mn).

A method of manufacturing a three-dimensional object, comprising:

• forming a powder layer by supplying a powder material containing a first powder composed of a first alloy and a second powder composed of a pure metal or a second alloy having a composition different from a composition of the first alloy;
• applying a liquid modeling agent to the powder layer;
• forming a sintering precursor by repeating the forming of the powder layer and the applying of the liquid modeling agent;
• and
• sintering the sintering precursor,
• wherein a difference (A−B) between a melting point (A) of the first powder and a melting point (B) of the second powder is 15° C. or greater and 200° C. or less,
• content of the second powder is 7% by mass or greater and 30% by mass or less relative to a total amount of the powder material, and
• (i) an area-weighted average grain size of the three-dimensional object obtained by sintering the sintering precursor at a maximum temperature of between the melting point of the first powder and the melting point that is the second powder is less than 1.80 times a volume average grain size of the first powder, and/or, (ii) the first alloy is a titanium alloy which contains at least boron (B), or an aluminum alloy which contains at least one of chromium (Cr), zirconium (Zr), scandium (Sc), or manganese (Mn).