采用PIT工艺,以分步法粉末为装管前驱粉,选用中心铜铌复合棒增强的导体结构制备了TiC掺杂MgB2多芯线材,研究了不同热处理温度对于粉末相组成、线材的微观结构以及超导电性的影响,结果表明分步法粉末能够有效提高C原子的取代水平,同时芯丝中MgB2晶粒尺寸达到亚微米级,MgB2晶粒连结性较好,制备多芯线材在4.2K,5T时,其Jc仍高达3×104A/cm2。 PIT technology was used to prepare the TiC-doped MgB2 multi-core wire by the step-by-step method. The effects of different heat treatment temperature on the phase composition of the powder, the microstructure of the wire, Superconductivity, the results show that the step-by-step powder can effectively improve the C atom substitution level, while the core wire MgB2 grain size sub micron level, MgB2 grain connectivity is good, the preparation of multi-core wire at 4.2K, 5T, its Jc is still as high as 3 × 104A / cm2.